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Journal of Medical Toxicology logoLink to Journal of Medical Toxicology
. 2020 Jun 2;16(4):423–443. doi: 10.1007/s13181-020-00781-9

Sex Differences in Pediatric Poisonings by Age Group: a Toxicology Investigators’ Consortium (ToxIC) Analysis (2010–2016)

Gillian A Beauchamp 1,2,, Jennifer L Carey 3, Matthew D Cook 1,2, Robert D Cannon 1,2, Kenneth D Katz 1,2, Jennifer Yoon 1, Hope Kincaid 4, Brittany J Ely 1, Emily Pollack 5, Richard J Mazzaccaro 5, Marna Rayl Greenberg 1; On behalf of the Toxicology Investigators Consortium (ToxIC)
PMCID: PMC7554275  PMID: 32488629

Abstract

Objective

To review pediatric poisonings evaluated at the bedside by medical toxicologists and reported in the ToxIC registry, by sex and age group.

Methods

Pediatric poisoning cases age ≤18 years, reported between January 2010 and December 2016, were reviewed. Descriptive statistics were used to describe study variables by age group and sex.

Results

A total of 12,699 cases were analyzed. There were 7517 females and 5182 males. Those < 2 years old represented 12.5% of the study group (n = 1584), 17.2% were 2–6 years old (n = 2178), 8.6% were 7–12 years old (n = 1097), and 61.7% were 13–18 years old (n = 7840). The most common primary reasons for encounter were intentional pharmaceutical with 4900 females and 1836 males; intentional non-pharmaceutical with 952 females and 1213 males; unintentional pharmaceutical with 539 females and 644 males; and unintentional non-pharmaceutical with 435 females and 593 males. Overall, pharmaceuticals were the most commonly involved agents, including analgesics (20.9% of cases) and antidepressants (11% of cases): 27.8% of females and 10.7% of males were reportedly exposed to an analgesic.13.7% of females and 7.0% of males were reportedly exposed to an antidepressant. Among 1584 cases under 2 years, there were 747 females and 837 males; among 2178 cases aged 2–6 years, there were 954 females and 1224 males; among 1097 cases aged 7–12 years, there were 555 females and 542 males; and among 7840 cases aged 13–18 years, there were 5261 females and 2579 males. Death was reported in 0.7% of the cases: 20 females and 18 males. 6.1% of cases were managed with intubation: 421 females and 351 males.

Conclusions

Sex-based characteristics of poisonings varied by age group among pediatric poisoning presentations reported to the ToxIC registry and further research is needed to determine implications for education and prevention efforts.

Keywords: Pediatrics, Medical toxicology, Poisonings, Sex differences

Introduction

Poisoning is a continued cause of morbidity and mortality in the pediatric population [1, 2]. Children younger than 20 represented close to 60% of all exposures reported to the National Poison Data System (NPDS) in 2017, and analgesics exposure was the most common cause of mortality due to poisoning in children < 5 years old [3]. The pediatric population is especially vulnerable to adverse drug reactions due to their unique physiological profile, such as their lower muscle mass and subsequently less gluconeogenic precursors, leading to increased risk of hypoglycemia [2, 4]. Even in low acuity cases, pediatric pharmaceutical ingestions lead to hospital admissions and cause significant healthcare cost burden [5, 6]. The rise in unintentional pediatric poisonings has been linked to increased adult prescription use, especially of opioid, medication for addiction treatment, attention deficit hyperactivity disorder (ADHD), cardiovascular, and sedative hypnotic agents [1, 69].

Understanding the epidemiology of pediatric poisonings is important to develop more targeted interventions. Underlying causes of increasing reports of adolescent suicide attempts, particularly involving analgesics, psychotropic medications, and ADHD medications, are not well understood, but may be correlated with adolescent risky behavior, increased information sharing, and self- medication practices [1012].

Current literature shows sex-based differences in risk behaviors and mental health diagnoses among adolescents, which may be due to exploration of gender and societal norms during puberty [13]. Boys are more prone to substance use disorders and self-medication, while girls are more at risk for suicide attempts [12, 13]. Previous research on sex differences in pharmaceutical ingestions has demonstrated sex-based differences in drug metabolism, and that females experience more adverse drug reactions, which may be due to lesser representation in clinical trials and subsequent lack of sex-specific dosing regimens [14, 15]. Examining sex differences, by age group, in a pediatric population may reveal how sex and age interact to modulate risk factors, clinical features, and treatment of poisonings. In this study, we set out to evaluate sex-based characteristics by age group in cases of pediatric poisonings that were evaluated by a medical toxicologist and submitted to the ToxIC (Toxicology Investigator’s Consortium) registry.

Patients and Methods

The ToxIC registry was established by the American College of Medical Toxicology in 2010 to create a central, de-identified database of patients seen by medical toxicologists in both inpatient and outpatient settings [16]. With over 50 participating facilities from the USA, Canada, Israel, and Saudi Arabia, the database captures more than 50,000 cases of toxicological exposures [16]. After consultation, medical toxicologists voluntarily complete forms, including information such as age and sex demographics, setting and reason for encounter (e.g., intentional and nonintentional exposures), toxicological agent, symptoms, and clinical interventions.

Cases of pediatric patients that were ≤ 18 years of age with known toxicological exposures from January 2010 through December 2016 were included in the study sample and analyzed. For consistency, standard categories for age and reason for encounter utilized in the ToxIC case submission system were also used in this study.

ToxIC defines “intentional pharmaceutical” as “intended use of approved medication for any purpose including self-harm, misuse/abuse, therapeutic use, or unknown.” Subcategories of intentional pharmaceutical use are also defined as follows: “attempt at self-harm”; “misuse/abuse”; “therapeutic use”; and “unknown.” “Attempt at self-harm” is further differentiated as either “suicide attempt,” where there is “at least some intent to die,” “no suicidal attempt,” where there “no intent to die, behavior for other reason such as to relieve stress,” or “suicidal intent unknown,” where “intent to die is unknown and cannot be inferred.” “Misuse/abuse” is defined as “no attempt at self-harm.” When selecting “misuse/abuse” as reason for encounter, the toxicologist can then select one or more of the following subcategories: “use of a prescription medication without a valid prescription”; “taking any prescription medication in doses greater than prescribed”; “taking any over the counter medication in doses higher than labeled”; “taking excess doses or using another’s medication for medical reasons (e.g., to treat a pain exacerbation)”; “taking a medication in an attempt to illicit a pleasurable sensation (e.g., to get “high”)”; or “taking the medication in an attempt to avoid withdrawal.” “Intentional non-pharmaceutical” as reason for exposure can also be similarly further defined, with one additional category: “drug concealment,” defined as “conceal drug with intent to avoid law enforcement.” Cases were excluded from the analysis if age or primary reason for encounter were missing, or if the toxicologist indicated that the consult was not related to a toxicological exposure. Demographic data of race, ethnicity, and pregnancy status were queried and reported as relative frequencies based on sex. Frequencies were categorized, and definitions used, based on the ToxIC Registry Data Sheet. Descriptive statistics (frequencies and percentages) were generated to summarize the reason for the encounter, exposure agent, route of administration, vital sign abnormalities, complications, and interventions performed by age group and by sex. When reporting descriptive statistics, any cases with “missing” or “N/A” were not included, but any cases with “unknown/uncertain” were still included. The study was presented to the lead author’s Institutional Review Board; it was reviewed and assigned a determination of Not Human Research, given that the study design involved analysis of an existing database housing de-identified data.

Results

From a total of 51,440 cases, 12,699 cases were analyzed (flow diagram, Fig. 1). There were 7517 females (59.2% of all cases) and 5182 males (40.8% of all cases). Those under 2 years old represented 12.5% of the study group (n = 1584): 17.2% were 2–6 years old (n = 2178), 8.6% were 7–12 years old (n = 1097), and 61.7% were 13–18 years old (n = 7840). Among 1584 cases under 2 years, there were 747 females (47.2% of cases < 2 years) and 837 males (52.8% of cases < 2 years). Among 2178 cases aged 2–6 years, there were 954 females (43.8% of cases 2–6 years) and 1224 males (56.2% of cases 2–6 years). Among 1097 cases aged 7–12 years, there were 555 females (50.6% of cases 7–12 years) and 542 males (49.4% of cases 7–12 years). Among 7840 cases aged 13–18 years, there were 5261 females (67.1% of cases 13–18 years) and 2579 males (32.9% of cases 13–18 years). For all ages taken together, the most common primary reason for a pediatric toxicology consult was for reported intentional pharmaceutical exposure (6736/12,699 or 53.0% of all cases), with females representing (4900/6736) 72.7% of those cases. The second most common primary reason for consult was intentional non-pharmaceutical (2165/12,699 or 17% of all cases) with males representing (1213/2165) 56.0% of those cases. Further demographics for all cases and by age group are described in Tables 1, 2, 3, 4, and 5.

Fig. 1.

Fig. 1

Flow diagram for pediatric poisonings reported to the Toxicology Investigators’ Consortium 2010–2016. Unknown data—indicated by medical toxicologist as “unknown”; Missing data—data not reported by the medical toxicologist

Table 1.

Demographics for pediatric poisonings reported to the Toxicology Investigators’ Consortium 2010–2016

Variable Total N Entire sample N = 12,699 (%) Female N = 7517 (%) Male N = 5182 (%)
Age 12,699
  < 2 years 1584 (12.5) 747 (9.9) 837 (16.2)
  2–6 years 2178 (17.2) 954 (12.7) 1224 (23.6)
  7–12 years 1097 (8.6) 555 (7.4) 542 (10.5)
  13–18 years 7840 (61.7) 5261 (70) 2579 (49.8)
Pregnancy status 7517
  Pregnant 40 (0.5) 40 (0.5) -
  Not pregnant 7477 (99.5) 7477 (99.5) -
Race 8312
  American Indian/Alaska Native 73 (0.9) 34 (0.7) 39 (1.2)
  Asian 151 (1.8) 92 (1.9) 59 (1.7)
  Australian Aboriginal 0 0 0
Black/African 1058 (12.7) 578 (11.7) 480 (14.2)
  Caucasian 4605 (55.4) 2759 (56) 1846 (54.5)
  Native Hawaiian or Pacific Islander 12 (0.1) 5 (0.1) 7 (0.2)
  Mixed 142 (1.7) 85 (1.7) 57 (1.7)
  Other 441 (5.3) 242 (4.9) 199 (5.9)
  Unknown/uncertain 1826 (22) 1129 (22.9) 697 (20.6)
Multiple races 4 (0.05) 3 (0.06) 1 (0.03)
  Hispanic/Latino 5429
  Yes 763 (14.1) 472 (14) 291 (14.1)
  No 3238 (59.6) 1992 (59.1) 1246 (60.5)
  Unknown 1428 (26.3) 904 (26.8) 524 (25.4)

Mixed race indicates toxicologist selected “mixed race” in demographics data for the case

Multiple races indicate the toxicologist selected multiple race categories during data collection

Table 2.

Demographics for pediatric cases < 2 years

Variable Total N Entire sample (N = 1584) Female (N = 747) Male (N = 837)
Race 980
  American Indian/Alaska Native 15 (1.5) 7 (1.5) 8 (1.6)
  Asian 20 (2.0) 12 (2.6) 8 (1.6)
  Australian Aboriginal 0 0 0
Black/African 152 (15.5) 72 (15.5) 80 (15.5)
  Caucasian 486 (49.6) 229 (49.2) 257 (49.9)
  Native Hawaiian or Pacific Islander 0 0 0
  Mixed 24 (2.4) 12 (2.6) 12 (2.3)
  Other 57 (5.8) 22 (4.7) 35 (6.8)
  Unknown/uncertain 226 (23.1) 111 (23.9) 115 (22.3)
Multiple races 0 0 0
  Hispanic/Latino 582
  Yes 92 (15.8) 41 (14.9) 51 (16.6)
  No 322 (55.3) 157 (57.1) 165 (53.7)
  Unknown 168 (28.9) 77 (28.0) 91 (29.6)

Mixed race indicates toxicologist selected “mixed race” in demographics data for the case

Multiple races indicate the toxicologist selected multiple race categories during data collection

Table 3.

Demographics for pediatric cases 2–6 years

Variable Total N Entire sample (N = 2178) Female (N = 954) Male (N = 1224)
Race 1372
  American Indian/Alaska Native 9 (0.7) 3 (0.5) 6 (0.8)
  Asian 26 (1.9) 14 (2.4) 12 (1.5)
  Australian Aboriginal 0 0 0
  Black/African 208 (15.2) 78 (13.2) 130 (16.7)
  Caucasian 711 (51.8) 315 (53.2) 396 (50.8)
  Native Hawaiian or Pacific Islander 1 (0.1) 1 (0.2) 0
  Mixed 25 (1.8) 13 (2.2) 12 (1.5)
  Other 82 (6.0) 35 (5.9) 47 (6.0)
  Unknown/uncertain 309 (22.5) 133 (22.5) 176 (22.6)
Multiple races 1 (0.1) 0 1 (0.1)
  Hispanic/Latino 781
  Yes 120 (15.4) 50 (15.2) 70 (15.5)
  No 454 (58.1) 193 (58.5) 261 (57.9)
  Unknown 207 (26.5) 87 (26.4) 120 (26.6)

Mixed race indicates toxicologist selected “mixed race” in demographics data for the case

Multiple races indicate the toxicologist selected multiple race categories during data collection

Table 4.

Demographics for pediatric cases 7–12 years

Variable Total N Entire sample (N = 1097) Female (N = 555) Male (N = 542)
Pregnancy status 555
  Pregnant 2 (0.4) 2 (0.4) -
  Not pregnant 553 (99.6) 553 (99.6) -
Race 738
  American Indian/Alaska Native 10 (1.4) 6 (1.6) 4 (1.1)
  Asian 10 (1.4) 3 (0.8) 7 (1.9)
  Australian Aboriginal 0 0 0
  Black/African 100 (13.6) 49 (13.2) 51 (13.9)
  Caucasian 427 (57.9) 223 (60.1) 204 (55.6)
  Native Hawaiian or Pacific Islander 1 (0.1) 0 1 (0.3)
  Mixed 15 (2.0) 8 (2.2) 7 (1.9)
  Other 31 (4.2) 9 (2.4) 22 (6.0)
  Unknown/uncertain 144 (19.5) 73 (19.7) 71 (19.3)
Multiple races 0 0 0
  Hispanic/Latino 507
  Yes 61 (12.0) 33 (12.0) 28 (12.0)
  No 327 (64.5) 176 (64.2) 151 (64.8)
  Unknown 119 (23.5) 65 (23.7) 54 (23.2)

Mixed race indicates toxicologist selected “mixed race” in demographics data for the case

Multiple races indicate the toxicologist selected multiple race categories during data collection

Table 5.

Demographics for pediatric cases 13–18 years

Variable Total N Entire sample (N = 7840) Female (N = 5261) Male (N = 2579)
Pregnancy status 5261
  Pregnant 35 (0.7) 35 (0.7) -
  Not pregnant 5226 (99.3) 5226 (99.3) -
Race 5222
  American Indian/Alaska Native 39 (0.7) 18 (0.5) 21 (1.2)
  Asian 95 (1.8) 63 (1.8) 32 (1.9)
  Australian Aboriginal 0 0 0
  Black/African 598 (11.5) 379 (10.8) 219 (12.7)
  Caucasian 2981 (57.1) 1992 (56.9) 989 (57.4)
  Native Hawaiian or Pacific Islander 10 (0.2) 4 (0.1) 6 (0.3)
  Mixed 78 (1.5) 52 (1.5) 26 (1.5)
  Other 271 (5.2) 176 (5.0) 95 (5.5)
  Unknown/uncertain 1147 (22.0) 812 (23.2) 335 (19.4)
Multiple races 3 (0.1) 3 (0.1) 0
  Hispanic/Latino 3559
  Yes 490 (13.8) 348 (14.0) 142 (13.3)
  No 2135 (60.0) 1466 (58.9) 669 (62.5)
  Unknown 934 (26.2) 675 (27.1) 259 (24.2)

Mixed race indicates toxicologist selected “mixed race” in demographics data for the case

Multiple races indicate the toxicologist selected multiple race categories during data collection

When analyzing all pediatric cases by sex, cases involving intentional pharmaceutical use as reason for the consult represented 65.2% of all female cases (4900/7517) and 35.4% of all male cases (1836/5182). Intentional use of non-pharmaceuticals (defined by the consortium as the “use of a substance other than an approved medications for any purpose”) was found in 12.7% of all female cases (952/7517) and in 23.4% of all males cases (1213/5182). Unintentional use of pharmaceuticals and non-pharmaceuticals combined was found in 23.9% of all male cases (1237/5182) and 13.0% of all female cases (974/7517). Envenomations (snake, spider, scorpion, other) were reported in 7.7% of all male cases (399/5182) and 4.3% of all female cases (322/7157).

Detailed toxicological exposure data by age group and by sex are reported in Tables 6, 7, 8, 9, 10, 11, 12, 13, 14, and 15.

Table 6.

Toxicological exposure information for pediatric poisonings reported to the Toxicology Investigators’ Consortium 2010–2016

Variable Total N Entire sample N = 12,699 (%) Female N = 7517 (%) Male N = 5182 (%)
Primary reason for encounter 12,699
  Intentional pharmaceutical 6736 (53) 4900 (65.2) 1836 (35.4)
  Intentional non-pharmaceutical 2165 (17) 952 (12.7) 1213 (23.4)
  Unintentional pharmaceutical 1183 (9.3) 539 (7.2) 644 (12.4)
  Unintentional non-pharmaceutical 1028 (8.1) 435 (5.8) 593 (11.4)
  Malicious/criminal 18 (0.1) 6 (0.1) 12 (0.2)
  ETOH abuse 44 (0.3) 18 (0.2) 26 (0.5)
  Withdrawal—ETOH 3 (0.02) 3 (0.04) 0
  Withdrawal—opioids 10 (0.1) 5 (0.1) 5 (0.1)
  Withdrawal—sedative-hypnotics 10 (0.1) 0 10 (0.2)
  Withdrawal—cocaine/amphetamines 1 (0.01) 1 (0.01) 0
  Withdrawal—other 12 (0.1) 2 (0.03) 10 (0.2)
  Envenomation—snake 414 (3.3) 162 (2.2) 252 (4.9)
  Envenomation—spider 108 (0.9) 62 (0.8) 46 (0.9)
  Envenomation—scorpion 29 (0.2) 18 (0.2) 11 (0.2)
  Envenomation—other 170 (1.3) 80 (1.1) 90 (1.7)
  Marine/fish poisoning 2 (0.02) 1 (0.01) 1 (0.02)
  Organ system dysfunction 112 (0.9) 51 (0.7) 61 (1.2)
  Interpretation of toxicology lab data 74 (0.6) 40 (0.5) 34 (0.7)
  Occupational evaluation 6 (0.05) 2 (0.03) 4 (0.08)
  Environmental evaluation 156 (1.2) 70 (0.9) 86 (1.7)
  Unknown 0 0 0
  Surveillance 0 0 0
  Adverse drug reaction 195 (1.5) 80 (1.1) 115 (2.2)
  Medication error 41 (0.3) 22 (0.3) 19 (0.4)
  Other 5 (0.04) 0 5 (0.1)
  More than one reason 177 (1.4) 68 (0.9) 109 (2.1)
Single or multiple exposure? 12,699
  Single exposure 9158 (72.1) 5172 (68.8) 3986 (76.9)
  Multiple exposure 3541 (27.9) 2345 (31.2) 1196 (23.1)
Agent #1 class 12,301
  Alcohol ethanol 173 (1.4) 72 (1.0) 101 (2.0)
  Alcohol toxic 100 (0.8) 42 (0.6) 58 (1.2)
  Amphetamine-like hallucinogen 5 (0.04) 3 (0.04) 2 (0.04)
  Analgesic 2570 (20.9) 2037 (27.8) 533 (10.7)
  Anesthetic 30 (0.2) 14 (0.2) 16 (0.3)
  Anticholinergic/antihistamine 839 (6.8) 536 (7.3) 303 (6.1)
  Anticoagulant 17 (0.1) 10 (0.1) 7 (0.1)
  Anticonvulsant 392 (3.2) 243 (3.3) 149 (3.0)
  Antidepressant 1349 (11) 1001 (13.7) 348 (7.0)
  Antimicrobials 80 (0.7) 44 (0.6) 36 (0.7)
  Antipsychotic 699 (5.7) 389 (5.3) 310 (6.2)
  Cardiovascular 806 (6.6) 426 (5.8) 380 (7.6)
  Caustic 135 (1.1) 62 (0.8) 73 (1.5)
  Chelator 1 (0.01) 0 1 (0.02)
  Chemotherapeutic and immune 47 (0.4) 26 (0.4) 21 (0.4)
  Cholinergic/parasympathomimetic 0 0 0
  Cough and cold 245 (2) 96 (1.3) 149 (3)
  Diabetic med 228 (1.9) 135 (1.8) 93 (1.9)
  Endocrine 38 (0.3) 26 (0.4) 12 (0.2)
  Envenomation 690 (5.6) 302 (4.1) 388 (7.8)
  Foreign objects 10 (0.1) 5 (0.1) 5 (0.1)
  Fungicide 0 0 0
  Gases/vapors/irritants/dust 157 (1.3) 76 (1) 81 (1.6)
  GI 37 (0.3) 16 (0.2) 21 (0.4)
  Herbals/dietary supps/vitamins 133 (1.1) 75 (1) 58 (1.2)
  Herbicide 3 (0.02) 2 (0.03) 1 (0.02)
  Household 272 (2.2) 119 (1.6) 153 (3.1)
  Hydrocarbon 154 (1.3) 50 (0.7) 104 (2.1)
  Insecticide 41 (0.3) 20 (0.3) 21 (0.4)
  Lithium 122 (1) 77 (1.1) 45 (0.9)
  Marine toxin 1 (0.01) 1 (0.01) 0
  Metals 236 (1.9) 118 (1.6) 118 (2.4)
  Opioid 565 (4.6) 291 (4) 274 (5.5)
  Other non-pharmaceutical 31 (0.3) 10 (0.1) 21 (0.4)
  Other pharmaceutical 37 (0.3) 25 (0.3) 12 (0.2)
  Parkinson’s med 7 (0.1) 5 (0.07) 2 (0.04)
  Photosensitizing agents 3 (0.02) 3 (0.04) 0
  Plants and fungi 94 (0.8) 39 (0.5) 55 (1.1)
  Psychoactive 485 (3.9) 164 (2.2) 321 (6.4)
  Pulmonary 15 (0.1) 11 (0.2) 4 (0.1)
  Rodenticide 31 (0.3) 11 (0.2) 20 (0.4)
  Sed-hypnotic/muscle relaxant 681 (5.5) 389 (5.3) 292 (5.9)
  Sympathomimetic 601 (4.9) 276 (3.8) 325 (6.5)
  WMD/NBC/riot 1 (0.01) 0 1 (0.02)
  Unknown agent 140 (1.1) 71 (1) 69 (1.4)
Route of administration 7677
  Oral 6626 (86.3) 4253 (90) 2373 (80.4)
  Inhalation 238 (3.1) 75 (1.6) 163 (5.5)
  Parenteral 195 (2.5) 91 (1.9) 104 (3.5)
  Intranasal 25 (0.3) 15 (0.3) 10 (0.3)
  Dermal 216 (2.8) 98 (2.1) 118 (4)
  Unknown 284 (3.7) 159 (3.4) 125 (4.2)
  Rectal 2 (0.03) 1 (0.02) 1 (0.03)
  Other 91 (1.2) 34 (0.7) 57 (1.9)
Type of exposure 9234
  Acute 8071 (87.4) 4986 (88.4) 3085 (85.9)
  Chronic 337 (3.6) 153 (2.7) 184 (5.1)
  Acute-on-chronic 674 (7.3) 426 (7.6) 248 (6.9)
  Unknown 152 (1.6) 76 (1.3) 76 (2.1)

Table 7.

Toxicological exposure information for pediatric cases < 2 years

Variable Total N Entire sample (N = 1584) Female (N = 747) Male (N = 837)
Primary reason for encounter 1584
  Intentional pharmaceutical 43 (2.7) 25 (3.3) 18 (2.2)
  Intentional non-pharmaceutical 487 (30.7) 247 (33.1) 240 (28.7)
  Unintentional pharmaceutical 411 (25.9) 192 (25.7) 219 (26.2)
  Unintentional non-pharmaceutical 462 (29.2) 194 (26.0) 268 (32.0)
  Malicious/criminal 14 (0.9) 5 (0.7) 9 (1.1)
  ETOH abuse 0 0 0
  Withdrawal—ETOH 1 (0.1) 1 (0.1) 0
  Withdrawal—opioids 2 (0.1) 2 (0.3) 0
  Withdrawal—sedative-hypnotics 1 (0.1) 0 1 (0.1)
  Withdrawal—cocaine/amphetamines 0 0 0
  Withdrawal—other 1 (0.1) 0 1 (0.1)
  Envenomation—snake 23 (1.5) 7 (0.9) 16 (1.9)
  Envenomation—spider 8 (0.5) 4 (0.5) 4 (0.5)
  Envenomation—scorpion 12 (0.8) 10 (1.3) 2 (0.2)
  Envenomation—other 21 (1.3) 8 (1.1) 13 (1.6)
  Marine/fish poisoning 1 (0.1) 1 (0.1) 0
  Organ system dysfunction 18 (1.1) 7 (0.9) 11 (1.3)
  Interpretation of toxicology lab data 28 (1.8) 19 (2.5) 9 (1.1)
  Occupational evaluation 0 0 0
  Environmental evaluation 21 (1.3) 11 (1.5) 10 (1.2)
  Unknown 0 0 0
  Surveillance 0 0 0
  Adverse drug reaction 8 (0.5) 3 (0.4) 5 (0.6)
  Medication error 8 (0.5) 5 (0.7) 3 (0.4)
  Other 0 0 0
  More than one reason 14 (0.9) 6 (0.8) 8 (1)
Single or multiple exposure? 1584
  Single exposure 1357 (85.7) 615 (82.3) 742 (88.6)
  Multiple exposure 227 (14.3) 132 (17.7) 95 (11.4)
Agent #1 class 1522
  Alcohol ethanol 14 (0.9) 7 (1.0) 7 (0.9)
  Alcohol toxic 33 (2.2) 11 (1.5) 22 (2.7)
  Amphetamine-like hallucinogen 0 0 0
  Analgesic 88 (5.8) 40 (5.6) 48 (6.0)
  Anesthetic 8 (0.5) 2 (0.3) 6 (0.7)
  Anticholinergic/antihistamine 34 (2.2) 19 (2.7) 15 (1.9)
  Anticoagulant 4 (0.3) 2 (0.3) 2 (0.2)
  Anticonvulsant 29 (1.9) 13 (1.8) 16 (2.0)
  Antidepressant 53 (3.5) 28 (3.9) 25 (3.1)
  Antimicrobials 16 (1.1) 6 (0.8) 10 (1.2)
  Antipsychotic 52 (3.4) 24 (3.4) 28 (3.5)
  Cardiovascular 188 (12.4) 101 (14.1) 87 (10.8)
  Caustic 55 (3.6) 24 (3.4) 31 (3.8)
  Chelator 0 0 0
  Chemotherapeutic and immune 5 (0.3) 1 (0.1) 4 (0.5)
  Cholinergic/parasympathomimetic 0 0 0
  Cough and cold 8 (0.5) 4 (0.6) 4 (0.5)
  Diabetic med 75 (4.9) 40 (5.6) 35 (4.3)
  Endocrine 6 (0.4) 4 (0.6) 2 (0.2)
  Envenomation 59 (3.9) 25 (3.5) 34 (4.2)
  Foreign objects 6 (0.4) 4 (0.6) 2 (0.2)
  Fungicide 0 0 0
  Gases/vapors/irritants/dust 14 (0.9) 6 (0.8) 8 (1.0)
  GI 13 (0.9) 4 (0.6) 9 (1.1)
  Herbals/dietary supps/vitamins 25 (1.6) 11 (1.5) 14 (1.7)
  Herbicide 1 (0.1) 1 (0.1) 0
  Household 134 (8.8) 56 (7.8) 78 (9.7)
  Hydrocarbon 77 (5.1) 29 (4.1) 48 (6.0)
  Insecticide 15 (1) 8 (1.1) 7 (0.9)
  Lithium 1 (0.1) 0 1 (0.1)
  Marine toxin 0 0 0
  Metals 47 (3.1) 23 (3.2) 24 (3.0)
  Opioid 147 (9.7) 79 (11.0) 68 (8.4)
  Other non-pharmaceutical 14 (0.9) 3 (0.4) 11 (1.4)
  Other pharmaceutical 10 (0.7) 5 (0.7) 5 (0.6)
  Parkinson’s med 2 (0.1) 1 (0.1) 1 (0.1)
  Photosensitizing agents 0 0 0
  Plants and fungi 18 (1.2) 14 (2.0) 4 (0.5)
  Psychoactive 42 (2.8) 21 (2.9) 21 (2.6)
  Pulmonary 3 (0.2) 1 (0.1) 2 (0.2)
  Rodenticide 20 (1.3) 6 (0.8) 14 (1.7)
  Sed-hypnotic/muscle relaxant 73 (4.8) 31 (4.3) 42 (5.2)
  Sympathomimetic 112 (7.4) 49 (6.8) 63 (7.8)
  WMD/NBC/riot 0 0 0
  Unknown agent 21 (1.4) 13 (1.8) 8 (1.0)
Route of administration 887
  Oral 747 (84.2) 341 (83.0) 406 (85.3)
  Inhalation 15 (1.7) 10 (2.4) 5 (1.1)
  Parenteral 25 (2.8) 11 (2.7) 14 (2.9)
  Intranasal 1 (0.1) 0 1 (0.2)
  Dermal 22 (2.5) 9 (2.2) 13 (2.7)
  Unknown 57 (6.4) 30 (7.3) 27 (5.7)
  Rectal 1 (0.1) 1 (0.2) 0
  Other 19 (2.1) 9 (2.2) 10 (2.1)
Type of exposure 1119
  Acute 1033 (92.3) 489 (93.7) 544 (91.1)
  Chronic 41 (3.7) 18 (3.4) 23 (3.9)
  Acute-on-chronic 14 (1.3) 4 (0.8) 10 (1.7)
  Unknown 31 (2.8) 11 (2.1) 20 (3.4)

Table 8.

Toxicological exposure information for pediatric cases 2–6 years

Variable Total N Entire sample (N = 2178) Female (N = 954) Male (N = 1224)
Primary reason for encounter 2178
  Intentional pharmaceutical 99 (4.5) 39 (4.1) 60 (4.9)
  Intentional non-pharmaceutical 718 (33.0) 322 (33.8) 396 (32.4)
  Unintentional pharmaceutical 604 (27.7) 276 (28.9) 328 (26.8)
  Unintentional non-pharmaceutical 404 (18.5) 166 (17.4) 238 (19.4)
  Malicious/criminal 3 (0.1) 0 3 (0.2)
  ETOH abuse 2 (0.1) 1 (0.1) 1 (0.1)
  Withdrawal—ETOH 0 0 0
  Withdrawal—opioids 0 0 0
  Withdrawal—sedative-hypnotics 0 0 0
  Withdrawal—cocaine/amphetamines 0 0 0
  Withdrawal—other 3 (0.1) 1 (0.1) 2 (0.2)
  Envenomation—snake 106 (4.9) 47 (4.9) 59 (4.8)
  Envenomation—spider 23 (1.1) 10 (1.0) 13 (1.1)
  Envenomation—scorpion 11 (0.5) 5 (0.5) 6 (0.5)
  Envenomation—other 53 (2.4) 24 (2.5) 29 (2.4)
  Marine/fish poisoning 0 0 0
  Organ system dysfunction 17 (0.8) 8 (0.8) 9 (0.7)
  Interpretation of toxicology lab data 18 (0.8) 6 (0.6) 12 (1.0)
  Occupational evaluation 0 0 0
  Environmental evaluation 47 (2.2) 20 (2.1) 27 (2.2)
  Unknown 0 0 0
  Surveillance 0 0 0
  Adverse drug reaction 35 (1.6) 16 (1.7) 19 (1.6)
  Medication error 9 (0.4) 5 (0.5) 4 (0.3)
  Other 1 (0.05) 0 1 (0.1)
  More than one reason 25 (1.1) 8 (0.8) 17 (1.4)
Single or multiple exposure? 2178
  Single exposure 1864 (85.6) 812 (85.1) 1052 (85.9)
  Multiple exposure 314 (14.4) 142 (14.9) 172 (14.1)
Agent #1 class 2091
  Alcohol ethanol 12 (0.6) 7 (0.8) 5 (0.4)
  Alcohol toxic 23 (1.1) 10 (1.1) 13 (1.1)
  Amphetamine-like hallucinogen 0 0 0
  Analgesic 137 (6.6) 70 (7.6) 67 (5.7)
  Anesthetic 7 (0.3) 5 (0.5) 2 (0.2)
  Anticholinergic/antihistamine 103 (4.9) 41 (4.5) 62 (5.3)
  Anticoagulant 5 (0.2) 0 5 (0.4)
  Anticonvulsant 53 (2.5) 24 (2.6) 29 (2.5)
  Antidepressant 103 (4.9) 44 (4.8) 59 (5.0)
  Antimicrobials 14 (0.7) 7 (0.8) 7 (0.6)
  Antipsychotic 104 (5.0) 53 (5.8) 51 (4.4)
  Cardiovascular 288 (13.8) 116 (12.6) 172 (14.7)
  Caustic 42 (2.0) 18 (2.0) 24 (2.1)
  Chelator 0 0 0
  Chemotherapeutic and immune 20 (1.0) 10 (1.1) 10 (0.9)
  Cholinergic/parasympathomimetic 0 0 0
  Cough and cold 34 (1.6) 18 (2.0) 16 (1.4)
  Diabetic med 82 (3.9) 43 (4.7) 39 (3.3)
  Endocrine 18 (0.9) 12 (1.3) 6 (0.5)
  Envenomation 185 (8.8) 78 (8.5) 107 (9.1)
  Foreign objects 2 (0.1) 0 2 (0.2)
  Fungicide 0 0 0
  Gases/vapors/irritants/dust 36 (1.7) 15 (1.6) 21 (1.8)
  GI 10 (0.5) 3 (0.3) 7 (0.6)
  Herbals/dietary supps/vitamins 35 (1.7) 16 (1.7) 19 (1.6)
  Herbicide 1 (0.05) 1 (0.1) 0
  Household 80 (3.8) 27 (2.9) 53 (4.5)
  Hydrocarbon 55 (2.6) 18 (2.0) 37 (3.2)
  Insecticide 7 (0.3) 3 (0.3) 4 (0.3)
  Lithium 2 (0.1) 0 2 (0.2)
  Marine toxin 0 0 0
  Metals 103 (4.9) 43 (4.7) 60 (5.1)
  Opioid 125 (6.0) 59 (6.4) 66 (5.6)
  Other non-pharmaceutical 12 (0.6) 7 (0.8) 5 (0.4)
  Other pharmaceutical 11 (0.5) 6 (0.7) 5 (0.4)
  Parkinson’s med 3 (0.1) 2 (0.2) 1 (0.1)
  Photosensitizing agents 0 0 0
  Plants and fungi 27 (1.3) 9 (0.1) 18 (1.5)
  Psychoactive 67 (3.2) 29 (3.1) 38 (3.2)
  Pulmonary 5 (0.2) 3 (0.3) 2 (0.2)
  Rodenticide 10 (0.5) 5 (0.5) 5 (0.4)
  Sed-hypnotic/muscle relaxant 147 (7.0) 72 (7.8) 75 (6.4)
  Sympathomimetic 91 (4.4) 33 (3.6) 58 (5.0)
  WMD/NBC/riot 0 0 0
  Unknown agent 32 (1.5) 14 (1.5) 18 (1.5)
Route of administration 1218
  Oral 1028 (84.4) 452 (84.8) 576 (84.1)
  Inhalation 30 (2.5) 9 (1.7) 21 (3.1)
  Parenteral 30 (2.5) 15 (2.8) 15 (2.2)
  Intranasal 0 0 0
  Dermal 62 (5.1) 30 (5.6) 32 (4.7)
  Unknown 52 (4.3) 23 (4.3) 29 (4.2)
  Rectal 0 0 0
  Other 16 (1.3) 4 (0.8) 12 (1.8)
Type of exposure 1494
  Acute 1339 (89.6) 584 (89.8) 755 (89.5)
  Chronic 77 (5.2) 31 (4.8) 46 (5.5)
  Acute-on-chronic 48 (3.2) 21 (3.2) 27 (3.2)
  Unknown 30 (2.0) 14 (2.2) 16 (1.9)

Table 9.

Toxicological exposure information for pediatric cases 7–12 years

Variable Total N Entire sample (N = 1097) Female (N = 555) Male (N = 542)
Primary reason for encounter 1097
  Intentional pharmaceutical 390 (35.6) 266 (47.9) 124 (22.9)
  Intentional non-pharmaceutical 112 (10.2) 47 (8.5) 65 (12.0)
  Unintentional pharmaceutical 95 (8.7) 31 (5.6) 64 (11.8)
  Unintentional non-pharmaceutical 84 (7.7) 31 (5.6) 53 (9.8)
  Malicious/criminal 1 (0.1) 1 (0.2) 0
  ETOH abuse 2 (0.2) 0 2 (0.4)
  Withdrawal—ETOH 0 0 0
  Withdrawal—opioids 0 0 0
  Withdrawal—sedative-hypnotics 1 (0.1) 0 1 (0.2)
  Withdrawal—cocaine/amphetamines 1 (0.1) 1 (0.2) 0
  Withdrawal—other 2 (0.2) 0 2 (0.4)
  Envenomation—snake 153 (13.9) 64 (11.5) 89 (16.4)
  Envenomation—spider 38 (3.5) 24 (4.3) 14 (2.6)
  Envenomation—scorpion 3 (0.3) 1 (0.2) 2 (0.4)
  Envenomation—other 46 (4.2) 25 (4.5) 21 (3.9)
  Marine/fish poisoning 0 0 0
  Organ system dysfunction 22 (2.0) 10 (1.8) 12 (2.2)
  Interpretation of toxicology lab data 10 (0.9) 2 (0.4) 8 (1.5)
  Occupational evaluation 0 0 0
  Environmental evaluation 38 (3.5) 15 (2.7) 23 (4.2)
  Unknown 0 0 0
  Surveillance 0 0 0
  Adverse drug reaction 67 (6.1) 24 (4.3) 43 (7.9)
  Medication error 15 (1.4) 7 (1.3) 8 (1.5)
  Other 1 (0.1) 0 1 (0.2)
  More than one reason 16 (1.5) 6 (1.1) 10 (1.8)
Single or multiple exposure? 1097
  Single exposure 902 (82.2) 438 (78.9) 464 (85.6)
  Multiple exposure 195 (17.8) 117 (21.1) 78 (14.4)
Agent #1 class 1058
  Alcohol ethanol 5 (0.5) 2 (0.4) 3 (0.6)
  Alcohol toxic 5 (0.5) 2 (0.4) 3 (0.6)
  Amphetamine-like hallucinogen 0 0 0
  Analgesic 97 (9.2) 85 (15.7) 12 (2.3)
  Anesthetic 8 (0.8) 3 (0.6) 5 (1.0)
  Anticholinergic/antihistamine 64 (6.0) 39 (7.2) 25 (4.8)
  Anticoagulant 1 (0.1) 1 (0.2) 0
  Anticonvulsant 42 (4.0) 19 (3.5) 23 (4.5)
  Antidepressant 85 (8.0) 60 (11.1) 25 (4.8)
  Antimicrobials 13 (1.2) 7 (1.3) 6 (1.2)
  Antipsychotic 59 (5.6) 21 (3.9) 38 (7.4)
  Cardiovascular 65 (6.1) 25 (4.6) 40 (7.8)
  Caustic 5 (0.5) 1 (0.2) 4 (0.8)
  Chelator 1 (0.1) 0 1 (0.2)
  Chemotherapeutic and immune 6 (0.6) 3 (0.6) 3 (0.6)
  Cholinergic/parasympathomimetic 0 0 0
  Cough and cold 10 (0.9) 3 (0.6) 7 (1.4)
  Diabetic med 16 (1.5) 11 (2.0) 5 (1.0)
  Endocrine 3 (0.3) 1 (0.2) 2 (0.4)
  Envenomation 233 (22.0) 111 (20.5) 122 (23.6)
  Foreign objects 0 0 0
  Fungicide 0 0 0
  Gases/vapors/irritants/dust 46 (4.3) 20 (3.7) 26 (5.0)
  GI 1 (0.1) 1 (0.2) 0
  Herbals/dietary supps/vitamins 14 (1.3) 7 (1.3) 7 (1.4)
  Herbicide 1 (0.1) 0 1 (0.2)
  Household 13 (1.2) 6 (1.1) 7 (1.4)
  Hydrocarbon 6 (0.6) 0 6 (1.2)
  Insecticide 11 (1.0) 3 (0.6) 8 (1.6)
  Lithium 16 (1.5) 8 (1.5) 8 (1.6)
  Marine toxin 1 (0.1) 1 (0.2) 0
  Metals 27 (2.6) 8 (1.5) 19 (3.7)
  Opioid 19 (1.8) 6 (1.1) 13 (2.5)
  Other non-pharmaceutical 1 (0.1) 0 1 (0.2)
  Other pharmaceutical 3 (0.3) 3 (0.6) 0
  Parkinson’s med 0 0 0
  Photosensitizing agents 3 (0.3) 3 (0.6) 0
  Plants and fungi 19 (1.8) 10 (1.8) 9 (1.7)
  Psychoactive 40 (3.8) 10 (1.8) 30 (5.8)
  Pulmonary 0 0 0
  Rodenticide 0 0 0
  Sed-hypnotic/muscle relaxant 56 (5.3) 35 (6.5) 21 (4.1)
  Sympathomimetic 51 (4.8) 21 (3.9) 30 (5.8)
  WMD/NBC/riot 0 0 0
  Unknown agent 12 (1.1) 6 (1.1) 6 (1.2)
Route of administration 647
  Oral 438 (67.7) 251 (73.2) 187 (61.5)
  Inhalation 38 (5.9) 16 (4.7) 22 (7.2)
  Parenteral 56 (8.7) 25 (7.3) 31 (10.2)
  Intranasal 0 0 0
  Dermal 66 (10.2) 27 (7.9) 39 (12.8)
  Unknown 26 (4.0) 15 (4.4) 11 (3.6)
  Rectal 0 0 0
  Other 23 (3.6) 9 (2.6) 14 (4.6)
  Type of exposure 781
  Acute 619 (79.3) 346 (82.6) 273 (75.4)
  Chronic 71 (9.1) 31 (7.4) 40 (11.0)
  Acute-on-chronic 67 (8.6) 35 (8.4) 32 (8.8)
  Unknown 24 (3.1) 7 (1.7) 17 (4.7)

Table 10.

Toxicological exposure jnformation for pediatric cases 13–18 years

Variable Total N Entire sample (N = 7840) Female (N = 5261) Male (N = 2579)
Primary reason for encounter 7840
  Intentional pharmaceutical 6204 (79.1) 4570 (86.9) 1634 (63.4)
  Intentional non-pharmaceutical 848 (10.8) 336 (6.4) 512 (19.9)
  Unintentional pharmaceutical 73 (0.9) 40 (0.8) 33 (1.3)
  Unintentional non-pharmaceutical 78 (1.0) 44 (0.8) 34 (1.3)
  Malicious/criminal 0 0 0
  ETOH abuse 40 (0.5) 17 (0.3) 23 (0.9)
  Withdrawal—ETOH 2 (0.03) 2 (0.04) 0
  Withdrawal—opioids 8 (0.1) 3 (0.1) 5 (0.2)
  Withdrawal—sedative-hypnotics 8 (0.1) 0 8 (0.3)
  Withdrawal—cocaine/amphetamines 0 0 0
  Withdrawal—other 6 (0.1) 1 (0.02) 5 (0.2)
  Envenomation—snake 132 (1.7) 44 (0.8) 88 (3.4)
  Envenomation—spider 39 (0.5) 24 (0.5) 15 (0.6)
  Envenomation—scorpion 3 (0.04) 2 (0.04) 1 (0.04)
  Envenomation—other 50 (0.6) 23 (0.4) 27 (1.0)
  Marine/fish poisoning 1 (0.01) 0 1 (0.04)
  Organ system dysfunction 55 (0.7) 26 (0.5) 29 (1.1)
  Interpretation of toxicology lab data 18 (0.2) 13 (0.2) 5 (0.2)
  Occupational evaluation 6 (0.1) 2 (0.04) 4 (0.2)
  Environmental evaluation 50 (0.6) 24 (0.5) 26 (1.0)
  Unknown 0 0 0
  Surveillance 0 0 0
  Adverse drug reaction 85 (1.1) 37 (0.7) 48 (1.9)
  Medication error 9 (0.1) 5 (0.1) 4 (0.2)
  Other 3 (0.04) 0 3 (0.1)
  More than one reason 122 (1.6) 48 (0.9) 74 (2.9)
Single or multiple exposure? 7840
  Single exposure 5035 (64.2) 3307 (62.9) 1728 (67.0)
  Multiple exposure 2805 (35.8) 1954 (37.1) 851 (33.0)
Agent #1 class 7630
  Alcohol ethanol 142 (1.9) 56 (1.1) 86 (3.5)
  Alcohol toxic 39 (0.5) 19 (0.4) 20 (0.8)
  Amphetamine-like hallucinogen 5 (0.1) 3 (0.1) 2 (0.1)
  Analgesic 2248 (29.5) 1842 (35.8) 406 (16.3)
  Anesthetic 7 (0.1) 4 (0.1) 3 (0.1)
  Anticholinergic/antihistamine 638 (8.4) 437 (8.5) 201 (8.1)
  Anticoagulant 7 (0.1) 7 (0.1) 0
  Anticonvulsant 268 (3.5) 187 (3.6) 81 (3.3)
  Antidepressant 1108 (14.5) 869 (16.9) 239 (9.6)
  Antimicrobials 37 (0.5) 24 (0.5) 13 (0.5)
  Antipsychotic 484 (6.3) 291 (5.7) 193 (7.7)
  Cardiovascular 265 (3.5) 184 (3.6) 81 (3.3)
  Caustic 33 (0.4) 19 (0.4) 14 (0.6)
  Chelator 0 0 0
  Chemotherapeutic and immune 16 (0.2) 12 (0.2) 4 (0.2)
  Cholinergic/parasympathomimetic 0 0 0
  Cough and cold 193 (2.5) 71 (1.4) 122 (4.9)
  Diabetic med 55 (0.7) 41 (0.8) 14 (0.6)
  Endocrine 11 (0.1) 9 (0.2) 2 (0.1)
  Envenomation 213 (2.8) 88 (1.7) 125 (5.0)
  Foreign objects 2 (0.03) 1 (0.02) 1 (0.04)
  Fungicide 0 0 0
  Gases/vapors/irritants/dust 61 (0.8) 35 (0.7) 26 (1.0)
 GI 13 (0.2) 8 (0.2) 5 (0.2)
  Herbals/dietary supps/vitamins 59 (0.8) 41 (0.8) 18 (0.7)
  Herbicide 0 0 0
  Household 45 (0.6) 30 (0.6) 15 (0.6)
  Hydrocarbon 16 (0.2) 3 (0.1) 13 (0.5)
  Insecticide 8 (0.1) 6 (0.1) 2 (0.1)
  Lithium 103 (1.3) 69 (1.3) 34 (1.4)
  Marine toxin 0 0 0
  Metals 59 (0.8) 44 (0.9) 15 (0.6)
  Opioid 274 (3.6) 147 (2.9) 127 (5.1)
  Other non-pharmaceutical 4 (0.1) 0 4 (0.2)
  Other pharmaceutical 13 (0.2) 11 (0.2) 2 (0.1)
  Parkinson’s med 2 (0.03) 2 (0.04) 0
  Photosensitizing agents 0 0 0
  Plants and fungi 30 (0.4) 6 (0.1) 24 (1.0)
  Psychoactive 336 (4.4) 104 (2.0) 232 (9.3)
  Pulmonary 7 (0.1) 7 (0.1) 0
  Rodenticide 1 (0.01) 0 1 (0.04)
  Sed-hypnotic/muscle relaxant 405 (5.3) 251 (4.9) 154 (6.2)
  Sympathomimetic 347 (4.5) 173 (3.4) 174 (7.0)
  WMD/NBC/riot 1 (0.01) 0 1 (0.04)
  Unknown agent 75 (1.0) 38 (0.7) 37 (1.5)
Route of administration 4925
  Oral 4413 (89.6) 3209 (93.3) 1204 (81.0)
  Inhalation 155 (3.1) 40 (1.2) 115 (7.7)
  Parenteral 84 (1.7) 40 (1.2) 44 (3.0)
  Intranasal 24 (0.5) 15 (0.4) 9 (0.6)
  Dermal 66 (1.3) 32 (0.9) 34 (2.3)
  Unknown 149 (3.0) 91 (2.6) 58 (3.9)
  Rectal 1 (0.02) 0 1 (0.1)
  Other 33 (0.7) 12 (0.3) 21 (1.4)
Type of exposure 5840
  Acute 5080 (87.0) 3567 (88.1) 1513 (84.5)
  Chronic 148 (2.5) 73 (1.8) 75 (4.2)
  Acute-on-chronic 545 (9.3) 366 (9.0) 179 (10.0)
  Unknown 67 (1.1) 44 (1.1) 23 (1.3)

Table 11.

Complications among pediatric poisonings reported to the Toxicology Investigators’ Consortium 2010–2016

Variable Total N Entire sample N = 12,699 (%) Female N = 7517 (%) Male N = 5182 (%)
Major vital sign abnormalities 4569
  Hypotension 213 (4.7) 139 (5.1) 74 (4)
  Hypertension 142 (3.1) 70 (2.6) 72 (3.9)
  Bradycardia 326 (7.1) 142 (5.2) 184 (9.9)
  Tachycardia 1202 (26.3) 759 (27.9) 443 (23.9)
  Tachypnea 0 0 0
  Bradypnea 106 (2.3) 56 (2.1) 50 (2.7)
  Hyperthermia 31 (0.7) 17 (0.6) 14 (0.8)
  Hypothermia 0 0 0
  None 2234 (48.9) 1374 (50.6) 860 (46.4)
  Multiple symptoms 315 (6.9) 160 (5.9) 155 (8.4)
Death 5769
  Yes 38 (0.7) 20 (0.6) 18 (0.8)
  No 5731 (99.3) 3547 (99.4) 2184 (99.2)
Life support withdrawn 38
  Yes 33 (86.8) 17 (85) 16 (88.9)
  No 3 (7.9) 2 (10) 1 (5.6)
  Unknown 2 (5.3) 1 (5) 1 (5.6)
CPR 12,699
  Yes 31 (0.2) 15 (0.2) 16 (0.3)
  No 12,668 (99.8) 7502 (99.8) 5166 (99.7)
ECMO 12,699
  Yes 21 (0.2) 13 (0.2) 8 (0.2)
  No 12,678 (99.8) 7504 (99.8) 5174 (99.8)
Intubation/ventilation 12,699
  Yes 772 (6.1) 421 (5.6) 351 (6.8)
  No 11,927 (93.9) 7096 (94.4) 4831 (93.2)

Table 12.

Complications for pediatric cases < 2 years

Variable Total N Entire Sample (N = 1584) Female (N = 747) Male (N = 837)
Major vital sign abnormalities 469
  Hypotension 20 (4.3) 9 (4.1) 11 (4.5)
  Hypertension 21 (4.5) 7 (3.2) 14 (5.7)
  Bradycardia 28 (6.0) 16 (7.2) 12 (4.9)
  Tachycardia 129 (27.5) 60 (27.0) 69 (27.9)
  Tachypnea 0 0 0
  Bradypnea 25 (5.3) 8 (3.6) 17 (6.9)
  Hyperthermia 4 (0.9) 3 (1.4) 1 (0.4)
  Hypothermia 0 0 0
  None 208 (44.3) 102 (45.9) 106 (42.9)
  Multiple symptoms 34 (7.2) 17 (7.7) 17 (6.9)
Death 648
  Yes 7 (1.1) 3 (1.0) 4 (1.2)
  No 641 (98.9) 299 (99.0) 342 (98.8)
Life support withdrawn 7
  Yes 7 (100.0) 3 (100.0) 4 (100.0)
  No 0 0 0
  Unknown 0 0 0
CPR 1584
  Yes 3 (0.2) 2 (0.3) 1 (0.1)
  No 1581 (99.8) 745 (99.7) 836 (99.9)
ECMO 1584
  Yes 2 (0.1) 1 (0.1) 1 (0.1)
  No 1582 (99.9) 746 (99.9) 836 (99.9)
Intubation/ventilation 1584
  Yes 77 (4.9) 38 (5.1) 39 (4.7)
  No 1507 (95.1) 709 (94.9) 798 (95.3)

Table 13.

Complications for pediatric cases 2–6 years

Variable Total N Entire sample (N = 2178) Female (N = 954) Male (N = 1224)
Major vital sign abnormalities 630
  Hypotension 30 (4.8) 11 (4.1) 19 (5.2)
  Hypertension 15 (2.4) 10 (3.7) 5 (1.4)
  Bradycardia 71 (11.3) 19 (7.1) 52 (14.3)
  Tachycardia 118 (18.7) 51 (19.1) 67 (18.5)
  Tachypnea 0 0 0
  Bradypnea 30 (4.8) 16 (6.0) 14 (3.9)
  Hyperthermia 6 (1.0) 3 (1.1) 3 (0.8)
  Hypothermia 0 0 0
  None 310 (49.2) 134 (50.2) 176 (48.5)
  Multiple symptoms 50 (7.9) 23 (8.6) 27 (7.4)
Death 868
  Yes 3 (0.3) 1 (0.3) 2 (0.4)
  No 865 (99.7) 372 (99.7) 493 (99.6)
Life support withdrawn 3
  Yes 3 (100.0) 1 (100.0) 2 (100.0)
  No 0 0 0
  Unknown 0 0 0
CPR 2178
  Yes 2 (0.1) 1 (0.1) 1 (0.1)
  No 2176 (99.9) 953 (99.9) 1223 (99.9)
ECMO 2178
  Yes 2 (0.1) 1 (0.1) 1 (0.1)
  No 2176 (99.9) 953 (99.9) 1223 (99.9)
Intubation/ventilation 2178
  Yes 99 (4.5) 42 (4.4) 57 (4.7)
  No 2079 (95.5) 912 (95.6) 1167 (95.3)

Table 14.

Complications for pediatric cases 7–12 years

Variable Total N Entire sample (N = 1097) Female (N = 555) Male (N = 542)
Major vital sign abnormalities 419
  Hypotension 10 (2.4) 5 (2.3) 5 (2.5)
  Hypertension 6 (1.4) 2 (0.9) 4 (2.0)
  Bradycardia 34 (8.1) 9 (4.1) 25 (12.4)
  Tachycardia 83 (19.8) 59 (27.2) 24 (11.9)
  Tachypnea 0 0 0
  Bradypnea 3 (0.7) 2 (0.9) 1 (0.5)
  Hyperthermia 3 (0.7) 2 (0.9) 1 (0.5)
  Hypothermia 0 0 0
  None 256 (61.1) 131 (60.4) 125 (61.9)
  Multiple symptoms 24 (5.7) 7 (3.2) 17 (8.4)
Death 510
  Yes 0 (0) 0 (0) 0 (0)
  No 510 (100.0) 269 (100.0) 241 (100.0)
Life support withdrawn -
  Yes - - -
  No - - -
  Unknown - - -
CPR 1097
  Yes 0 0 (0) 0 (0)
  No 1097 (100.0) 555 (100.0) 542 (100.0)
ECMO 1097
  Yes 0 0 (0) 0 (0)
  No 1097 (100.0) 555 (100.0) 542 (100.0)
Intubation/ventilation 1097
  Yes 47 (4.3) 24 (4.3) 23 (4.2)
  No 1050 (95.7) 531 (95.7) 519 (95.8)

Table 15.

Complications for pediatric cases 13–18 years

Variable Total N Entire sample (N = 7840) Female (N = 5261) Male (N = 2579)
Major vital sign abnormalities 3051
  Hypotension 153 (5.0) 114 (5.7) 39 (3.8)
  Hypertension 100 (3.3) 51 (2.5) 49 (4.7)
  Bradycardia 193 (6.3) 98 (4.9) 95 (9.1)
  Tachycardia 872 (28.6) 589 (29.3) 283 (27.2)
  Tachypnea 0 0 0
  Bradypnea 48 (1.6) 30 (1.5) 18 (1.7)
  Hyperthermia 18 (0.6) 9 (0.4) 9 (0.9)
  Hypothermia 0 0 0
  None 1460 (47.9) 1007 (50.1) 453 (43.6)
  Multiple symptoms 207 (6.8) 113 (5.6) 94 (9.0)
Death 3743
  Yes 28 (0.7) 16 (0.6) 12 (1.1)
  No 3715 (99.3) 2607 (99.4) 1108 (98.9)
Life support withdrawn 28
  Yes 23 (82.1) 13 (81.3) 10 (83.3)
  No 3 (10.7) 2 (12.5) 1 (8.3)
  Unknown 2 (7.1) 1 (6.3) 1 (8.3)
CPR 7840
  Yes 26 (0.3) 12 (0.2) 14 (0.5)
  No 7814 (99.7) 5249 (99.8) 2565 (99.5)
ECMO 7840
  Yes 17 (0.2) 11 (0.2) 6 (0.2)
  No 7823 (99.8) 5250 (99.8) 2573 (99.8)
Intubation/ventilation 7840
  Yes 549 (7.0) 317 (6.0) 232 (9.0)
  No 7291 (93.0) 4944 (94.0) 2347 (91.0)

When analyzing all pediatric cases by age group, among 1584 cases for patients with age less than 2 years (747 females and 837 males), the most common reported reason for consult was intentional non-pharmaceutical exposure (487/1584 or 30.7% of cases) with females representing (247/487) 50.7% of these cases. The most common agent involved among all reported exposures in this age group was cardiovascular medications (188/1522 or 12.4% of cases), with females representing (101/188) 53.7% of those cases.

Among 2178 cases for patients with age 2–6 years (954 females and 1224 males), the most common reported reason for consult was intentional non-pharmaceutical exposure (718/2178 or 33% of cases) with males representing (396/718) 55.2% of these cases. The most common agent involved among all reported exposures in this age group was cardiovascular medications (288/2091 or 13.8% of cases) with males representing (172/288) 59.7% of those cases.

Among 1097 cases for patients with age 7–12 years (555 females and 542 males), the most common reason for consult was intentional pharmaceutical (390/1097 or 35.6% of cases), with females representing (266/390) 68.2% of these cases. The most common pharmaceutical agent involved among all reported exposures in this age group was analgesics (97/1058 or 9.2% of cases) with females representing (85/97) 87.6% of those cases.

Among 7840 cases for patients age 13–18 years (5261 females and 2579 males), the most common reason for consult was intentional pharmaceutical (6204/7840 or 79.1% of cases), with females representing (4570/6204) 73.7% of these cases. The most common pharmaceutical agent involved among all reported exposures in this age group was analgesics (2248/7630 or 29.5% of cases) with females representing (1842/2248) 81.9% of those cases.

Among 38 reported cases that died during their hospital stay, 7 were < 2 years of age (3 females, 4 males), 3 were age 2–6 years (1 female, 2 males), and 28 were age 13–18 (16 females, 12 males). In the age < 2 years decedents, reasons for encounter were 4 unintentional pharmaceutical, 1 intentional pharmaceutical, 1 intentional non-pharmaceutical, and 1 for interpretation of toxicology laboratory data. Among decedents aged 2–6 years, reasons for encounter included 1 for withdrawal, 1 for environmental evaluation, and 1 for “more than one reason.” Among deaths in the age group 13–18, 19 were seen for intentional pharmaceutical, 4 for intentional non-pharmaceutical, 2 for interpretation of toxicology laboratory data, 2 for environmental evaluation, and 1 for organ system dysfunction.

Discussion

Pediatric cases queried from the ToxIC registry from 2010 to 2016 showed that more than half of the encounters were patients aged 13–18 and intentional pharmaceutical was the most common reported exposure. These findings suggest that this age group may be at increased risk of self-harm attempts through toxicological ingestions. Existing studies have also shown a rapid increase in intentional poisonings among adolescents in recent years, with drug overdoses and poisonings identified as the sixth highest cause of death in pediatrics in 2016 [17, 18]. Our results once again point to an urgent need for public health initiatives that identify and reduce adolescent poisonings, with a particular focus on self-harm attempts.

Given the common availability of pharmaceutical agents in home environments, as well as that an estimated 19.8% of children and adolescents are prescribed at least one medication, [19] prevention interventions, such as safer medication storage, safer pharmaceutical packaging, prescribing precautions, and prevention education may be important to reducing morbidity [20]. Among patients aged 7–12 years, intentional pharmaceutical exposures were most common, further suggesting that efforts may be needed to ensure medications are stored more safely in the household. Analgesics were the most common pharmaceutical agent among reported exposures in both the 7–12- and 13–18-year age groups, consistent with studies that have shown that over the counter products like analgesics are more likely to be stored improperly, thus potentially increasing access [1]. Existing literature suggests that analgesics are the most likely agent used in suicidal intent [18, 21]. Interestingly, analgesics are also the most common self- medication agent used by adolescents, due to perceived safety and widespread availability [12]. Together, these findings suggest that caregivers and adolescents may benefit from medication education specifically directed to analgesics, their storage, and their appropriate use.

In both under 2-year and the 2–6-year age groups, cardiovascular medications were most commonly implicated in reported exposures. Prior studies of children presenting to emergency departments with poisoning by medications have implicated cardiovascular medications as a common reported exposure [1, 7]. Prior ToxIC registry analyses of pediatric exposures have also implicated cardiovascular medications as a common reported etiology of toxicity [22]. While NPDS studies most commonly report analgesics as the most common agent involved in pediatric poisonings [3], cases reported to ToxIC registry are potentially higher acuity cases seen by a toxicologist, and thus, medications with potential to cause more severe toxicity may be more commonly reported in ToxIC-based research.

Our results describe characteristics in toxicological consultations by sex. Our study case numbers by sex among patients with unintentional pharmaceutical and non-pharmaceutical exposures aged 2–6 years appear to align with the most recent NPDS data, which reported increased risk of pediatric exploratory ingestions among males [23], and prior studies that show that toddler males were more prone to accidental ingestions [24]. While the reasons are unclear, males may express more exploratory behavior that puts them at risk for encountering improperly stored pharmaceuticals. Our study finding that envenomations were reported in 7.7% of all male cases and 4.3% of all female cases is consistent with studies that show males are more at risk for snakebites than females [25].

Our study findings that female cases represented 59.2% of all cases, 67.1% of all cases in the age 13–18 years category, and 73.7% of intentional pharmaceutical exposures among cases aged 13–18 years align with previous studies that found that adolescent females were more likely than adolescent males to attempt suicide through self-poisonings [11, 26]. Sex has been acknowledged as a moderator of adolescent suicidal behavior, with females more likely to overdose, while males are more likely to use firearms [27]. While the reasons are unclear, it may be due to exploration of social norms and gender roles during adolescence. Females are more likely to be body-conscious and consider the state of their body after suicide completion, while males are more familiar with using firearms [27].

Previous literature has shown that substance dependence is twice as common in adult and adolescent males as females [28]. Our study findings that males represented 60.4% of intentional non-pharmaceutical exposures and 57.5% of ethanol abuse cases among those aged 13–18 years are consistent with this literature. This may be due to gender norms that influence adolescent males to use substances in social bonding and to treat pain autonomously through self-medication [13]. In both males and females, substance dependence is associated with depression, trauma, and suicide risk [28]. Our results point to the need for further research focused on sex-specific initiatives that target adolescents in substance use prevention.

The most common clinical complication in the pediatric patients included in the ToxIC registry was tachycardia (63.1% were female), and bradycardia (56.4% male). Further research outside of a limited dataset, such as the ToxIC registry, would be needed to determine if there are statistically significant sex-specific differences in cardiotoxicity following pediatric poisonings that may mirror known sex differences in adult cardiotoxicity related to medications, such as antipsychotics and antidepressants [29].

There are several limitations to this study. Given voluntary reporting, cases seen by a toxicologist at institutions participating in the ToxIC registry may go unreported; thus, this data may not represent all bedside toxicology consults performed at ToxIC sites. Further, some toxicological cases presenting to any participating institution may not be evaluated at the bedside by a medical toxicologist, and thus may not be included in the registry. There may have been less severe exposures, or even fatalities at reporting institutions that may have been treated without consultation by a toxicologist. The number of sites participating in the ToxIC registry varies by year, thus making year-to-year comparisons unfeasible within this dataset. Case descriptors selected by the medical toxicologist submitting case information may not be interpreted similarly by all participating toxicologists, thus resulting in confounding of data. For example, when indicating “intentional” as reason for a pediatric exploratory exposure, the registry does not clearly define if the substance was defined as such due to self-administration, or due to administration with specific intent. The nature of voluntary reporting of all case variables, including race, ethnicity, reason for exposure, and presenting signs and symptoms, may result in under-reporting or inaccurate reporting of such findings. We excluded cases where age or reason for the encounter was missing, thus potentially introducing bias into the analysis. Sensitivity analysis around the possibilities for missing data was not performed; thus, it is not possible to estimate potential bias. Further, the ToxIC registry does not capture all toxicology consults seen across the USA, as not all institutions with a toxicology service participate in the ToxIC registry. Thus, this registry is not the appropriate data source to determine the nature or urgency of poisoning prevention strategies. The authors acknowledge that more comprehensive morbidity and mortality data, along with economic analyses, would be needed to define necessary public health interventions related to pediatric poisoning. Data collection was limited to female and male sex. Following the completion of this study, ToxIC has begun to collect data on transgender patients. Thus, a limitation of this study is that transgender data was not collected during the study time period. Confirmatory testing is not typically reported within the ToxIC registry; thus, identification of the agents involved in reported exposures is often provided based on the best judgement of the bedside toxicologist. Lastly, some cases were missing data for specific variables, and therefore, the sample size for those variables was reduced.

Conclusions

We report characteristics of pediatric poisonings reported to the ToxIC registry by age and sex categories. Raw data appeared consistent with the limited existing literature around age- and sex-based risk factors for poisoning presentations. Our findings may provide the groundwork for hypothesis generation around sex- and age-based outcomes, education, and prevention efforts for poisonings among children.

Acknowledgments

The authors would like to acknowledge Anita Kurt, PhD, Director of Research Operations at Lehigh Valley Health Network Department of Emergency and Hospital Medicine, for her oversight of this project; Lexis Laubach, Research Assistant, Department of Emergency and Hospital Medicine, for her assistance with manuscript preparation. The authors appreciate the leadership and support of ToxIC leadership including Jeffrey Brent, MD, PhD, Diane P. Calello, MD, and Paul M. Wax, MD. The authors would like also to acknowledge the efforts of Shae Duka, BS, for her statistical analysis and Lexis Laubach, BS, for her editorial assistance.

Compliance with Ethical Standards

Conflicts of Interest

None.

Sources of Funding

This study, in part, was funded by an unrestricted grant, the Dorothy Rider Pool Trust for Health Research and Education community foundation grant (number 2017 1573-015).

Footnotes

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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