Patient characteristics
| Control (n=34) | ICBT (n=33) | Total (n=67) | ||||
| Sex (% girls) | 41 | 52 | 46 | |||
| Age (M, SD) | 14, 97 | (1, 66) | 14, 21 | (1, 69) | 14, 60 | (1, 71) |
| Country of birth (%) | ||||||
| Sweden | 88 | 97 | 93 | |||
| Other European | 6 | 3 | 4 | |||
| Asian | 6 | 0 | 3 | |||
| Educational level (%) | ||||||
| Primary | 0 | 3 | 1 | |||
| High school | 29 | 21 | 25 | |||
| College | 3 | 6 | 4 | |||
| Vocational | 6 | 3 | 4 | |||
| University | 50 | 48 | 49 | |||
| Doctoral degree | 0 | 3 | 1 | |||
| Other | 12 | 15 | 13 | |||
| OCD symptom severity baseline score, CY-BOCS (M, SD) | 22, 12 | (3, 91) | 23, 00 | (4, 31) | 22, 55 | (4, 10) |
| Number of comorbid diagnoses (%) | ||||||
| 0 | 53 | 61 | 57 | |||
| 1 | 35 | 21 | 28 | |||
| 2 | 9 | 9 | 9 | |||
| 3 | 3 | 6 | 4 | |||
| 4 | 0 | 3 | 1 | |||
| Medication (ongoing) | ||||||
| None | 82 | 72 | 78 | |||
| SSRI | 18 | 18 | 18 | |||
| Stimulants | 3 | 6 | 4 | |||
| Tricyclic antidepressants | 0 | 3 | 1 | |||
| Type of referral | ||||||
| Self-referral | 91 | 94 | 93 | |||
| CAMHS referral | 9 | 6 | 7 | |||
CAMHS, Child and Adolescent Mental Health Service; CY-BOCS, Children’s Yale-Brown Obsessive Compulsive Scale; ICBT, internet-delivered cognitive behaviour therapy; OCD, obsessive–compulsive disorder; SSRI, selective serotonin reuptake inhibitor.