Validating the measurement of the non-prescribed use of psychotropic medications in school population surveys: a mixed method approach
Abstract
Background: Research shows increases in non-prescribed use of prescription drugs in adolescents. Effective policy responses require valid measurement of this behaviour. Aim: To validate student reports on non-prescribed use of opioid analgesics, tranquilisers and sedatives collected through self-completion questionnaires in cross-sectional school surveys. Methods: The study employed a mixed quantitative (questionnaires administered in school involving 890 students aged 16-18) and qualitative approach (respondent debriefing). Data were collected on three indicators: content and response process, internal structure, and empirical validity. Inferential statistics were used for the quantitative data (Pearson chi-square or McNemar’s test, uni- and multivariable logistic regression analysis, estimates of Cohen's κ, Cramer’s V, and Spearman’s rho) and the framework approach was used for the analysis of the qualitative data. Results: Data suggest a valid measurement of tranquiliser / sedative ...
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