Main samples OCD table
| Publication | Definition | Age of onset in years (SD) | Duration of illness in years (SD) | YBOCS (SD) | Obsessions YBOCS (SD) | Compulsions YBOCS (SD) |
| Carmona 2007... | Individuals with OCD | N/A | N/A | 21.39 (5.88) | 10.28 (4.28) | 10.94 (4.27) |
| Christian 20... | Individuals with OCD | N/A | N/A | 27.00 (5.20) | 13.10 (2.90) | 13.90 (2.90) |
| Gilbert 2008... | Individuals with OCD | 29.50 (10.80) | 8.00 | 26.90 (6.30) | 13.80 | 13.12 |
| Gilbert 2008... | Individuals with OCD | N/A | N/A | 26.50 (5.40) | 13.70 (2.90) | 12.70 (3.10) |
| Kim 2001... | Individuals with OCD | 19.00 | 8.40 (6.70) | 24.20 (8.00) | 13.00 (3.30) | 11.20 (5.00) |
| Pujol 2004... | Individuals with OCD | 17.00 (5.90) | 13.00 (10.50) | 26.70 (7.10) | 13.70 (3.40) | 13.00 (4.80) |
| Riffkin 2005... | Individuals with OCD | N/A | N/A | 23.30 (6.50) | 12.20 (3.00) | 11.20 (4.60) |
| Soriano-Mas ... | Individuals with OCD (2nd sample) | 19.70 (6.10) | 11.30 (9.40) | 21.00 (5.70) | 10.90 (3.10) | 10.10 (3.00) |
| Szeszko 2008... | Individuals with OCD | 9.40 (3.10) | 3.60 | 24.90 (6.00) | 12.80 (4.40) | 12.00 (3.20) |
| Valente 2005... | Individuals with OCD | 14.40 | 18.30 (10.60) | 24.60 (7.40) | 12.40 (3.90) | 12.20 (3.60) |
| van den Heuv... | Individuals with OCD | N/A | N/A | 22.83 (6.13) | N/A | N/A |
| Yoo 2008... | Individuals with OCD | 18.59 (6.52) | 8.02 (6.10) | 22.84 (8.40) | 12.35 (4.31) | 10.49 (5.00) |