Group; mean ± SD or no. (%) | ||||
---|---|---|---|---|
Characteristic | OCD, n = 329 | Control, n = 316 | Statistic | p value |
Age, yr | 32.03 ± 9.39 | 31.18 ± 9.42 | t = 1.139 | 0.26 |
Male sex | 172 (52.3%) | 162 (51.3%) | χ2 = 0.066 | 0.81 |
Race* | χ2 = 5.918 | 0.12 | ||
White | 160 (54.6%) | 175 (58.9%) | — | — |
Asian | 129 (44%) | 111 (37.4%) | — | — |
Other | 4 (1.4%) | 11 (3.7%) | — | — |
Right-handedness† | 276 (90.5%) | 280 (92.7%) | χ2 = 1.103 | 0.58 |
Educational level, yr | 14.09 ± 2.91 | 14.37 ± 3.18 | t = −1.176 | 0.24 |
Age at symptom onset, yr‡ | 19.76 ± 8.36 | — | — | — |
Y-BOCS score | ||||
Obsessions subscale§ | 12.50 ± 3.28 | — | — | — |
Compulsions subscale§ | 12.04 ± 3.79 | — | — | — |
Total score¶ | 24.54 ± 6.18 | — | — | — |
Medication history§ | ||||
Medication naive | 77 (25.9%) | — | — | — |
Taking medication | 220 (74.1%) | — | — | — |
OCD = obsessive–compulsive disorder; SD = standard deviation; Y-BOCS = Yale–Brown Obsessive–Compulsive Scale.
↵* Data available for 590 participants.
↵† Data avilable for 607 participants.
↵‡ Age at onset was defined as the age when symptoms became a substantial source of distress and interfered with the patient’s social functioning. Data available for 311 participants.
↵§ Data available for 297 participants.
↵¶ Data available for 298 participants.