Table 4:

Estimated adjusted^† percentage difference in C-reactive protein per 25% increase in 24-hour average measured pollutant concentration, or by stove type among traditional and Justa stove users, rural Honduras

Pollutant		N	Percentage Difference in CRP	95% CI
Kitchen PM2.5 (μg/m3)‡		74	4.2	−1.1, 9.7
Personal PM2.5 (μg/m3)‡		73	10.5	1.2, 20.6*
Kitchen BC (μg/m3)‡		75	3.9	0.1, 7.8*
Personal BC (μg/m3)‡		73	4.2	−0.5, 9.1
Stove type§	Traditional	54	24.6	−33.4, 133.1
	Justa (ref)	56

Cl: Confidence interval; PM_2.5: fine particulate matter; CRP (C-reactive protein)

^†Sample size included only participants with both exposure and CRP. Models were adjusted for age, body mass index (BMI), number of assets (<2 or ≥2), electricity (yes/no), years of education (<6 or ≥6)

^‡In continuous exposure models, CRP and measured pollution were both log transformed. Beta coefficients were entered into the formula ((1.25^β)-1) and multiplied by 100. We can interpret the estimate of the continuous pollution exposures as a percent increase in inflammatory marker for each 25% increase in exposure. Example: There is a 10.5% higher CRP level with a 25% higher personal PM_2.5 concentration.

^§Inflammatory marker was log-transformed. Categorical variable beta coefficients were entered into the formula (e^β−1)*100). The estimates for the categorical measures of exposure can be interpreted as the percent difference in inflammatory marker when comparing traditional stove to the reference (Justa stove).

^*Significant at the 0.05 level