After adjusting for age , body mass index , an asset index , smoking , secondhand tobacco smoke , apparent temperature , season , day of week , time of day , and a random subject intercept , the improved stove intervention was associated with 3.7 mm Hg lower SBP [ 95 % confidence interval ( CI ) , -8.1 to 0.6 ] and 3.0 mm Hg lower DBP ( 95 % CI , -5.7 to -0.4 ) compared with controls .
