Abstract
Methods Schools at various centres were randomly selected. Children of eligible age group were included in the study after confirming with the school records. Two groups of children aged between 6-7 year and 13-14 year were selected and questionnaires were given. Parents of the younger age group children answered the questionnaire. The 13-14 year aged children answered the questions themselves along with an additional video questionnaire. The questionnaire included questions regarding exposure to traffic pollution and environmental tobacco smoke. Bivariate analysis was used to calculate the odds ratio.
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