TABLE 1.
Demographic and clinical characteristics of the healthy controls (N = 368) and OCD patient (N = 412) group (as shown in De Wit et al. (2014))
| Characteristic | OCD patients | Healthy controls | Statistics | |||
|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | t | p | |
| Age (years) (range) | 32.1 (29.4) | 9.6 | 30.2 (28.5) | 9.3 | 2.9 | 0.004 |
| Education level (years (range) | 13.7 (10.8) | 2.8 | 14.6 (8.7) | 3.1 | −4.0 | <0.001 |
| YBOCS score (IQR) | 24.9 (5.9) | 6.2 | ||||
| Age at onset of clinical symptoms (years, range) | 20.1 (7.8) | 8.7 | ||||
| N | % | N | % | χ2 | p | |
| Male | 202 | 49.0 | 195 | 53.0 | 1.2 | 0.28 |
| Right‐handed | 354 | 85.9 | 330 | 89.7 | 1.0 | 0.65 |
| Ethnicity | 2.7 | 0.26 | ||||
| Caucasian | 195 | 47.3 | 192 | 52.2 | ||
| Asian | 171 | 41.5 | 146 | 39.7 | ||
| Other | 6 | 1.5 | 11 | 3.0 | ||
| Medication use at time of scan | 176 | 42.7 | 0 | 0.0 | 210.1 | <0.001 |
| Current comorbidity | 149 | 36.2 | 0 | 0.0 | 210.1 | <0.001 |
| Lifetime comorbidity | 213 | 51.7 | 7 | 1.9 | 253.7 | <0.001 |
| Prepubertal OCD onset | 51 | 13.0 | ||||
| OCD symptom dimensions (YBOCS) | Mean | SD | ||||
| Aggression/checking (IQR) | 236 (13.5) | 57.2 | ||||
| Contamination/cleaning (IQR) | 202 (28.7) | 49.0 | ||||
| Symmetry/ordering (IQR) | 168 (34.2) | 40.8 | ||||
| Sexual/religious (IQR) | 130 (21.5) | 31.6 | ||||
| Hoarding (IQR) | 87 (13.6) | 21.1 | ||||