Table 1.
Clinical and demographic characteristics of patients with obsessive–compulsive disorder and healthy controls
| Group, mean ± SD or no. (%) | ||||
|---|---|---|---|---|
|
|
||||
| Characteristic | OCD, n = 106 | Control, n = 87 | Statistic | p value |
| Age, yr | 33.11 ± 9.37 | 32.13 ± 9.57 | t191 = 0.72 | 0.47 |
| Age at onset of OCS, yr* | 17.0 ± 8.85 | — | — | — |
| Illness duration, yr* | 16.08 ± 10.29 | — | — | — |
| Y-BOCS | ||||
| Obsessions | 13.0 ± 3.20 | — | — | — |
| Compulsions | 13.45 ± 2.97 | — | — | — |
| Total score | 26.46 ± 5.86 | — | — | — |
| Global DY-BOCS score† | 22.37 ± 4.28 | — | — | — |
| DY-BOCS severity scores† | ||||
| Aggression‡ | 6.58 ± 5.20 | — | — | — |
| Sexual/religious§ | 3.67 ± 5.27 | — | — | — |
| Symmetry¶ | 7.24 ± 5.44 | — | — | — |
| Contamination | 6.34 ± 5.74 | — | — | — |
| Hoarding | 2.93 ± 4.10 | — | — | — |
| Miscellaneous** | 7.18 ± 5.59 | — | — | — |
| Female sex | 56 (52.8) | 49 (56.3) | χ21 = 0.24 | 0.67 |
| Years of education | χ22 = 4.23 | 0.12 | ||
| 9–13 | 62 (58.5) | 39 (44.8) | ||
| 14–18 | 37 (34.9) | 36 (41.4) | ||
| 19–24 | 7 (6.6) | 12 (13.8) | ||
| Right-handed | 98 (92.4) | 86 (98.8) | χ22 = 3.89 | 0.14 |
| Lifetime history of tics | 18 (17.0) | — | — | — |
| Lifetime history of depression | 41 (38.7) | — | — | — |
| Lifetime history of anxiety disorders | 39 (36.8) | — | — | — |
DY-BOCS = Dimensional Yale–Brown Obsessive–compulsive Scale; OCD = obsessive–compulsive disorder; OCS = obsessive–compulsive symptoms; SD = standard deviation; Y-BOCS = Yale–Brown Obsessive–Compulsive Scale.
*
One missing value.
†
Two missing values.
‡
Obsessions about harm due to aggression, injury, violence, natural disasters and related compulsions.
§
Sexual, moral and religious obsessions and related compulsions.
¶
Includes compulsions to count or order/arrange.
**
Includes obsessions and compulsions about somatic concerns and superstitions, among other symptoms not classified in the previous symptom dimensions.