Test-retest reliability of self-reported adolescent addictive and other risk behaviours in Tanzania, South Africa and Zimbabwe

Key Points

• The aim was to evaluate the reliability of self-reported addictive and other risk behaviors among adolescents using questionnaires in three countries.
• Questionnaires administered in Swahili, Xhosa, and Shona across three sites: Dar es Salaam, Cape Town, and Harare.
• Sample size included 119 participants in Tanzania, 104 in South Africa, and 112 in Zimbabwe.
• Analysis utilized Cohen's kappa for reliability metrics.
• Reliability was poor for 0 variables, fair for 5 variables, moderate for 16 variables, substantial for 20 variables, and almost perfect for 2 variables according to Cohen's kappa.
• Observed agreement was above 90% for 22 out of 27 variables, indicating high consistency in self-reported data.
• All three versions of the questionnaire demonstrated acceptable reliability.