Table 5 presents adjusted HRs (95% CIs) for lung cancer mortality in relation to mean PM2.5 (1999–2000) concentrations stratified according to selected participant characteristics at enrollment.
Similar results were observed in men and women and across categories of attained age and educational attainment.
However, results varied across categories of BMI, with a stronger association observed in participants with a normal BMI (18.5–24.9 kg/m2) (HR per each 10 μg/m3 = 1.42; 95% CI, 1.07–1.88) compared with other BMI groups (P < 0.05).
Results were also found to vary by a history of self-reported physician-diagnosed asthma, or any CLD, at enrollment with stronger associations observed in those with a positive history of asthma (HR per each 10 μg/m3 = 5.18; 95% CI, 1.96–13.71) or any CLD (HR per each 10 μg/m3 = 3.78; 95% CI, 1.69–8.43) compared with those without (P < 0.05).