Fig. 3
From: The joint effects of physical activity and air pollution on type 2 diabetes in older adults
The exposure–response relationship between PA and type 2 diabetes at different exposure levels of air pollution for older adults. The nine values in subplots A, B and C represented the different pollution concentrations (µg/m3) of PM10, PM2.5 and PM1 respectively. The OR limit is set to 5, and the grey shaded area indicated the confidence interval (95% CI). The 95% CI not containing the value of 1, represented by the horizontal dashed line, indicated that the association is statistically significant. Covariates mentioned in the Methods section were integrated by the bi-dimensional GPS, which was combined in the outcome model