Table 1.
Characteristics of the cohorts.
| Characteristics | Category | EGOS | NORDiC | ||
|---|---|---|---|---|---|
| Number of OCD cases | 1108 | 1107 | |||
|
| |||||
| Sex, count (%) | Females | 692 | (63%) | 651 | (59%) |
|
| |||||
| Comorbidities, count (%) | CTD (ICD-10: F95) | 100 | (9%) | 43 | (5%)1 |
| ADHD (ICD-10: F90) | 40 | (4%) | 83 | (10%)1 | |
| Bipolar Disorder (ICD-10: F31) | 33 | (3%) | 93 | (11%)1 | |
| Phobic anxiety disorders (ICD-10: F40) | 19 | (2%) | 98 | (12%)1 | |
| Other anxiety disorders (ICD-10: F41) | 112 | (10%) | 106 | (13%)1 | |
| Autistic disorder (ICD-10: F84.0) | 3 | (0.3%) | 8 | (1%)1 | |
| Asperger’s syndrome (ICD-10: F84.5) | 40 | (4%) | 51 | (6%)1 | |
| Intellectual disability (ICD-10: F71–73) | 7 | (0.6%) | 2 | (0.2%)1 | |
| At least one psychiatric comorbidity | 417 | (37%) | 424 | (53%)1 | |
|
| |||||
| Diagnosis age/Age at first symptom (p5, Median, p95)2 | (12,21,34) | (5,12,30)3 | |||
1
283 individuals have missing values (n=804).
2
p5 and p95 are the 5th and 95th percentiles.
3
437 missing values (n=670).
OCD: obsessive-compulsive disorder, CTD: chronic tic disorders, ADHD: attention-deficit/hyperactivity disorder.