Table 2.
Baseline sociodemographic and clinical characteristics of participants with and without ADHD (N = 804)
| ADHD, n = 93 | No ADHD, n = 711 | χ2 | df | P | Missing data | |
|---|---|---|---|---|---|---|
| n (%) | n (%) | na | ||||
| Non-suicidal self-injury (NSSI) | 27 (29) | 111 (16) | 10.4 | 1 | .001 | – |
| Women | 70 (75) | 471 (66) | 3.04 | 1 | .08, ns | – |
| Age group | ||||||
| 18–44 | 81 (87) | 461 (65) | 18.55 | 1 | <.001 | – |
| 45–64 | 11 (12) | 169 (24) | 6.75 | 1 | .01 | – |
| 65+ | 1 (1) | 81 (11) | 9.56 | 1 | .002 | – |
| Clinical diagnosisb | ||||||
| Alcohol use disorder (F10.1/F10.2) | 4 (4) | 76 (11) | 3.75 | 1 | .05, ns | – |
|
Drug misuse disorder (F11-F19, F17 excluded) |
12 (13) | 78 (11) | 0.31 | 1 | .58, ns | – |
| Depression (F32.X and/or F33.X) | 12 (13) | 218 (31) | 12.7 | 1 | <.001 | – |
| Anxiety, stress (F40–49) | 42 (45) | 278 (39) | 1.26 | 1 | .26, ns | – |
| Personality disorder (F60–69) | 28 (30) | 142 (20) | 5.07 | 1 | .02 | – |
| Emotionally unstable personality disorder (F60.3) | 22 (24) | 115 (16) | 3.26 | 1 | 0.07, ns | – |
| Autism spectrum disorder (F80–89) | 21 (23) | 33 (5) | 42.2 | 1 | <.001 | – |
| WHO hazardous use cut-off, AUDIT | 34 (51) | 256 (48) | 0.24 | 1 | .63, ns | 199 |
| Trait impulsivity, SUAS 11 | 58 (62) | 283 (40) | 17.1 | 1 | <.001 | – |
| Impulsivity at index suicide attempt (n = 666), SIS 15 | 39 (60) | 251 (43) | 7.04 | 1 | .01 | 14 |
| High medical lethality, index suicide attempt (n = 666), C-SSRS | 16 (25) | 196 (35) | 2.39 | 1 | .12, ns | 36 |
| Recent relationship problems | 70 (75) | 456 (64) | 4.44 | 1 | .04 | 1 |
ADHD Attention deficit hyperactivity disorder, AUDIT Alcohol Use Disorders Identification Test, SUAS 11 Suicide Assessment Scale item 11, SIS 15 Suicide Intent Scale item 15, C-SSRS Columbia Suicide Severity Rating Scale
aNo significant differences in proportions missing between groups
bParticipants could have more than one diagnosis