Identification of a threshold for biomass exposure index for chronic bronchitis in rural women of Mysore district, Karnataka, India.

The regression was found to be highly significant ( P =0.002) for Mysore district ( Fig. 1a ), Mysore taluk ( P =0.008) ( Fig. 1b ) and Nanjangud taluk ( P =0.001) ( Fig. 1c ).

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