The reliability and validity of the WHO student drug-use questionnaire among Nigerian students.

The reliability and validity of the World Health Organization student drug-use survey model questionnaire was tested among 96 senior secondary school students in the Abeokuta Local Government Area of Ogun State, Nigeria. The exercise was the major theme of a pilot study of a student drug-use survey carried out in this area. The test-retest interval was 4 weeks. The questionnaire was found to be reliable when group and individual (item by item) comparisons were made. The validity scores were also comparable to those of widely accepted previous studies. It was concluded that the questionnaire is reliable and valid enough for use in this environment to allow for comparisons. It can also yield better results if slightly modified and when respondents become more familiar with questionnaire surveys.