Fig. 3
Odds ratio and 95% CIs between diabetes and annual average levels for air pollution exposures by NHMS survey years. Note: The ambient air pollution was modelled with the interquartile range increment (IQR) for the annual average levels of air pollutant exposures: IQR of NOx = 16.83 μg/m3; NO2 = 9.57 μg/m3; SO2 = 4.16 μg/m3; O3 = 7.83 μg/m3; PM10 = 10.34 μg/m3. The models were adjusted for age, gender, ethnicity, urban/rural areas, body mass index (BMI) and physical activity