Background Epidemiological studies among drug users are often based on retrospective self-reports.
However, among others, memory failure, being under the influence of drugs, psychopathology, misunderstanding of questions and socially desirable answering may generate inaccurate reporting.
Methods This study validated self-reported current (methadone dosage) and medium-term (main location of methadone dispensing and frequency of methadone programme attendance over the previous 4-6 months) aspects of methadone treatment in the Amsterdam AIDS cohort study among drug users, using data of the Central Methadone Register.
In addition to descriptive measures, logistic regression analysis was used (adjusted for intra-individual correlation) to identify subgroups with incorrect reporting.
Data collected at 4406 visits of 505 cohort participants were analysed.
Results Current methadone dosage was accurately reported (unweighted kappa [kappa] : 0.94, weighted kappa [kappaW] : 0.97).
A low methadone dosage, short duration of school education and depressive or euphoric mood during the interview were significant and independent predictors of incorrect reporting of methadone dosage.
For main location of dispensing kappa was 0.82, for frequency of programme attendance kappa was 0.53 and kappaW 0.87.
There was a tendency to reporting the extreme answering categories. (...)
Mots-clés Pascal : Toxicomanie, Méthadone, Traitement substitutif, Epidémiologie, Prévalence, Validité, Méthodologie, Homme
Mots-clés Pascal anglais : Drug addiction, Methadone, Replacement therapy, Epidemiology, Prevalence, Validity, Methodology, Human
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0341839
Code Inist : 002B30A01A1. Création : 14/12/1999.