BACKGROUND : Pretesting a questionnaire is an important activity before the start of the main epidemiological study.
AIM : The study tested the reliability (internal consistency) of the modified ATS-DLD-78 adult respiratory diseases questionnaire
developed by the British Medical Research Council.
RESULTS : The questionnaire was found to be reliable and admissible with an overall Cronbach’s alpha coefficient of α = 0.74.
CONCLUSION : The questionnaire is a reliable instrument for data collection and can be a useful tool for collecting data in a
developing country. The questionnaire will be used to study the association between respiratory and cardiovascular diseases
among older people and community’s proximity to mine dumps