Table 2.
Patient characteristics at the time of the first antipsychotic prescription: age, sex, intellectual functioning, primary psychiatric diagnosis, and treatment setting
| Total sample (n = 436) | |
|---|---|
| Age, mean (SD) [range], y | 10.1 (3.43) [3.33–17.9] |
| Sex, n (%) | |
| Male | 332 (76.1%) |
| Female | 104 (23.9%) |
| Intellectual functioning, n (%) | |
| Borderline (TIQ 70–79) | 60 (13.8%) |
| Low average (TIQ 80–89) | 92 (21.1%) |
| Average (TIQ 90–109) | 126 (28.9%) |
| High average (TIQ 110–119) | 39 (8.9%) |
| Superior (TIQ 120–129) | 27 (6.2%) |
| Very superior (TIQ > 129) | 5 (1.1%) |
| Not reported | 87 (20.0%) |
| Primary DSM-IV axis I diagnosis, n (%) | |
| Autism spectrum disorder | 229 (52.5%) |
| Attention deficit/hyperactivity disorder | 82 (18.8%) |
| Disruptive behavior disorder | 21 (4.8%) |
| Other DSM-IV diagnosesa | 61 (14.0%) |
| No diagnosis | 43 (9.9%) |
| Treatment setting in which antipsychotic was prescribed, n (%) | |
| Inpatient | 38 (8.7%) |
| Outpatient | 398 (91.3%) |
DSM-IV Diagnostic and Statistical Manual of Mental Disorders, fourth edition; TIQ, total intelligence quotient
aThis category includes all other axis I diagnoses mentioned in the DSM-IV