METHODS
Sample
This cross-sectional study was conducted in rural areas of Bankura District under the province of West Bengal, India. In the present study, four schools were selected by random sampling procedure out of eight Government-approved secondary schools under the Bankura-I block of Bankura District. The study was carried out during the period of August 2012 to September 2012. School records were utilized to ascertain the age of students. Total 1674 school children studying in 5th to 10th standard, with age group of 10 to 15 years were enrolled in the present study.