Background: According to the World Health Organization, depression ranks as a major contributor to the global burden of disease. A large proportion of adult depressions had their first appearance in adolescence.
Aim: Because primary health care professionals lack valid instruments for early identification of depression, we sought to validate HSCL-10. The design of study is a GP multicentre study conducted in Norway and Denmark. The setting of the study is adolescents (14-16 years) responded by answering a questionnaire and later completed a Composite International Diagnostic Interview, which was used as the gold standard. Depression was defined by International Classification of Diseases-10 (ICD-10). Both internal and external validity were examined, the likelihood between pretest and posttest measured and a cut-off point for depression calculated by using the Youden index.
Results: The Hopkins Symptom Checklist-10 test (HSCL-10) met the criteria for external and internal validity. When analysed separately, the criteria were met both in Denmark and in Norway and both for paper and web. The optimal cut-off point for the HSCL-10 test was 16 (HSCL-10 = 16/10 items = 1.6), with no gender differences. For girls and boys, respectively, it yielded a sensitivity of 87.5% and 87.5%, specificity of 72.4% and 87.9% and likelihood of 3.2 and 7.2.
Conclusion: HSCL-10 is a suitable and valid instrument for detecting depression in young people in primary care.