Conditional logistic regression analyses were used to estimate the association between OCD and suicidal behavior and other variables of interest expressed as OR with 95% confidence intervals (CI). In adjusted models, we controlled for parental level of education and different groups of psychiatric comorbidities. For the main outcomes, analyses were stratified by sex, setting (inpatients and outpatients) and ICD version of the first OCD diagnosis received. The specific methods of death by suicide and attempted suicide were also described and frequencies in both cohorts were compared using OR and the corresponding 95% CI.
