The raw data was
analysed using Statistical Package of Social Science (SPSS version 20.0) software to determine variance
between groups and descriptive statistics. The geometric mean of 24-h indoor PM2.5 concentration is
approximately 818 mg m3 (Standard deviation (SD ¼ 3.61)). The highest 24-h geometric mean of PM2.5
concentration observed were 1134 mg m3 (SD ¼ 3.36), 637 mg m3 (SD ¼ 4.44), and 335 mg m3
(SD ¼ 2.51), respectively, in households using predominantly solid fuel, kerosene, and clean fuel.