Table 1: Descriptive characteristics of the study population.

VariablesAge ≤45 yearsPercentageAge >45 yearsPercentage

Total number of Subjects6922

Education
 Literate5173.91359.1
 Illiterate1826.1940.9

Occupation
 Homemaker4869.61463.6
 Employed2130.4836.4

House Type
 Pucca2637.71568.2
 Kutcha4362.3731.8

Income per annum
 ≥Rs.250006391.31150
 <Rs.2500068.71150

Cooking fuel type
 Clean fuel3652.21359.1
 Biomass fuel3347.8940.9