Main samples general table
| Publication | Definition | Sample size | Age in years (SD) | Males (%) | Right handed (%) | Years of education (SD) |
| Carmona 2007... | Individuals with OCD | 18 | 12.86 (2.76) | 13 (72%) | 15 (83%) | N/A |
| Christian 20... | Individuals with OCD | 21 | 38.00 (9.60) | 15 (71%) | 14 (67%) | 14.60 (1.70) |
| Gilbert 2008... | Individuals with OCD | 25 | 37.50 (10.70) | 13 (52%) | N/A | N/A |
| Gilbert 2008... | Individuals with OCD | 10 | 12.90 (2.70) | 6 (60%) | 10 (100%) | N/A |
| Kim 2001... | Individuals with OCD | 25 | 27.40 (7.00) | 17 (68%) | 24 (96%) | 14.20 (2.20) |
| Pujol 2004... | Individuals with OCD | 72 | 29.80 (10.50) | 40 (56%) | 61 (85%) | 13.20 (3.60) |
| Riffkin 2005... | Individuals with OCD | 18 | 36.14 (12.99) | 8 (44%) | 17 (94%) | 12.08 (2.96) |
| Soriano-Mas ... | Individuals with OCD (2nd sample) | 30 | 31.90 (9.30) | 21 (70%) | 28 (93%) | 12.20 (2.90) |
| Szeszko 2008... | Individuals with OCD | 37 | 13.00 (2.70) | 14 (38%) | 21 (57%) | N/A |
| Valente 2005... | Individuals with OCD | 19 | 32.70 (8.80) | 10 (53%) | 17 (89%) | 11.68 (1.02) |
| van den Heuv... | Individuals with OCD | 55 | 33.70 (9.19) | 16 (29%) | 49 (89%) | N/A |
| Yoo 2008... | Individuals with OCD | 71 | 26.61 (7.50) | 47 (66%) | 68 (96%) | N/A |