TABLE 1.
Demographic and Clinical Characteristics Among Privately Insured and Medicaid Pediatric Patients
| Patient Characteristicsa | Privately Insured | Medicaid | ||
|---|---|---|---|---|
| Peanut Allergy Cohort n = 3,084 | Peanut Allergy–Free Cohort n = 30,840 | Peanut Allergy Cohort n = 1,245 | Peanut Allergy–Free Cohort n = 12,450 | |
| Age as of the index date, mean ± SD (median), y | 8.3 ± 3.6 (7.0) | 8.3 ± 3.6 (7.0) | 7.9 ± 3.7 (7.0) | 7.9 ± 3.7 (7.0) |
| Male, n (%) | 1,839 (59.6) | 18,390 (59.6) | 703 (56.5) | 7,030 (56.5) |
| Race,a n (%) | ||||
| White | – | – | 467 (37.5) | 4,670 (37.5) |
| Black | – | – | 523 (42.0) | 5,230 (42.0) |
| Region of residence,b n (%) | ||||
| Northeast | 1,104 (35.8) | 11,040 (35.8) | – | – |
| South | 793 (25.7) | 7,930 (25.7) | – | – |
| West | 560 (18.2) | 5,600 (18.2) | – | – |
| Midwest | 513 (16.6) | 5,130 (16.6) | – | – |
| State of residence, n (%) | ||||
| Iowa | – | – | 271 (21.8) | 2,710 (21.8) |
| Kansas | – | – | 103 (8.3) | 1,030 (8.3) |
| Mississippi | – | – | 411 (33.0) | 4,110 (33.0) |
| Missouri | – | – | 182 (14.6) | 1,820 (14.6) |
| New Jersey | – | – | 235 (18.9) | 2,350 (18.9) |
| Wisconsin | – | – | 43 (3.5) | 430 (3.5) |
| Health plan type,b n (%) | ||||
| PPO | 1,971 (63.9) | 19,710 (63.9) | – | – |
| POS | 437 (14.2) | 4,370 (14.2) | – | – |
| HMO | 289 (9.4) | 2,890 (9.4) | 421 (33.8) | 4,210 (33.8) |
| Non-HMO | – | – | 824 (66.2) | 8,240 (66.2) |
| Year of index date, n (%) | ||||
| 2007 | 496 (16.1) | 4,960 (16.1) | 69 (5.5) | 690 (5.5) |
| 2008 | 307 (10.0) | 3,070 (10.0) | 84 (6.7) | 840 (6.7) |
| 2009 | 430 (13.9) | 4,300 (13.9) | 149 (12.0) | 1,490 (12.0) |
| 2010 | 509 (16.5) | 5,090 (16.5) | 157 (12.6) | 1,570 (12.6) |
| 2011 | 312 (10.1) | 3,120 (10.1) | 194 (15.6) | 1,940 (15.6) |
| 2012 | 323 (10.5) | 3,230 (10.5) | 179 (14.4) | 1,790 (14.4) |
| 2013 | 243 (7.9) | 2,430 (7.9) | 151 (12.1) | 1,510 (12.1) |
| 2014 | 263 (8.5) | 2,630 (8.5) | 138 (11.1) | 1,380 (11.1) |
| 2015 | 173 (5.6) | 1,730 (5.6) | 101 (8.1) | 1,010 (8.1) |
| 2016 | 28 (0.9) | 280 (0.9) | 23 (1.8) | 230 (1.8) |
| Length of study period, months; median ± SD (median) | 54.5 ± 29.5 (49.2) | 49.4 ± 28.8 (43.2) | 47.8 ± 27.3 (41.9) | 49.9 ± 26.5 (44.5) |
| Comorbidities frequently associated with peanut allergy during the study period, n (%)c | ||||
| Asthma | 1,690 (54.8) | 4,210 (13.7) | 777 (62.4) | 2,299 (18.5) |
| Atopic dermatitis/eczema | 1,076 (34.9) | 4,106 (13.3) | 631 (50.7) | 2,220 (17.8) |
| One or more specified food allergies (other than peanut) | 1,300 (42.2) | 247 (0.8) | 518 (41.6) | 59 (0.5) |
| Allergic rhinitis | 2,049 (66.4) | 6,320 (20.5) | 876 (70.4) | 3,321 (26.7) |
| Depression | 420 (13.6) | 2,998 (9.7) | 192 (15.4) | 1,730 (13.9) |
| Anxiety | 332 (10.8) | 2,309 (7.5) | 104 (8.4) | 762 (6.1) |
aPatient characteristics were balanced, with a standardized difference of 0.00 for all covariates, except length of study period (0.17 for privately insured patients and 0.08 for Medicaid patients).
bOnly the most prevalent categories were reported; unknown category was not reported.
cComparisons between the peanut allergy and peanut allergy–free cohorts were statistically significant (all P < 0.01).
HMO = health maintenance organization; POS = point of service; PPO = preferred provider organization.