Fig. 1From: NO2 and PM2.5 air pollution co-exposure and temperature effect modification on pre-mature mortality in advanced age: a longitudinal cohort study in ChinaRestricted cubic spline describing effect of the NO2 of the year closest to death on mortality before and after adjusting for PM2.5. Note: The left figure adjusted for age, gender, education, household income, marital status, smoking status, drinking status, physical activity, residence, geographical region of residence, and BMI. The right figure additionally adjusted for PM2.5Back to article page