Demographic and clinical characteristics of the sample, by treatment condition
| BIP TIC ERP (n=12) | BIP TIC HRT (n=11) | |
| Age, mean (SD); min–max | 11.80 (2.51); 8–15 | 12.79 (2.62); 8–16 |
| Males, n (%) | 8 (67) | 7 (64) |
| Tic disorder, n (%) | ||
| TD | 12 (100) | 10 (91) |
| PTD | 0 (0) | 1 (9) |
| Comorbidity, n (%) | ||
| Anxiety disorder | 2 (17) | 4 (36) |
| Attention-deficit/hyperactivity disorder | 5 (42) | 4 (36) |
| Depression | 0 (0) | 1 (9) |
| Obsessive-compulsive disorder | 2 (17) | 1 (9) |
| Previous contact with child/adolescent mental health services | ||
| Yes, n (%) | 12 (100) | 10 (91) |
| Previous psychological treatment for TD/PTD, n (%) | ||
| None | 11 (92) | 8 (73) |
| Behaviour therapy | 1 (8) | 2 (18) |
| Other | 0 (0) | 1 (9) |
| Baseline medication status | ||
| None | 11 (92) | 8 (73) |
| Antipsychotic | 0 (0) | 2 (18) |
| Stimulant | 0 (0) | 1 (9) |
| SSRI | 0 (0) | 1 (9) |
| Melatonin | 1 (8) | 0 (0) |
| Distance from home to clinic, km, mean (median); min–max | 51 (23.5); 7–212 | 84 (37.6); 5–416 |
| Education, main parent involved in treatment, n (%) | ||
| Primary school | 0 (0) | 1 (9) |
| Secondary school | 1 (8) | 3 (27) |
| College/university | 9 (75) | 6 (55) |
| Doctoral degree | 2 (17) | 1 (9) |
BIP TIC ERP, internet-delivered exposure and response prevention; BIP TIC HRT, internet-delivered habit reversal training; PTD, persistent (chronic) motor or vocal tic disorder; SSRI, selective serotonin reuptake inhibitor; TD, Tourette’s disorder.