Table 4

Sensitivity analyses: adjusted HR with a 10 μg/m³ increase in NO₂ levels and 95% CI for cardiopulmonary mortality

	HR	(95% CI)
Sensitivity analysis 1*
Area mean income as a socioeconomic factor	1.14	1.05 to 1.24

Sensitivity analysis 2†
Restriction to participants living within 25 km of the sampling sites	1.13	1.02 to 1.25

Sensitivity analysis 3†
Restriction to participants who were assigned positive NO₂ concentrations	1.15	1.04 to 1.27

↵* Adjusted for age, sex, smoking category, BMI category, hypertension, diabetes and area mean income.
↵† Adjusted for age, sex, smoking category, BMI category, hypertension, diabetes and financial capability.
BMI, body mass index.