Fig. 2
From: The joint effects of physical activity and air pollution on type 2 diabetes in older adults
The balance results of covariates in the weighted (blue), and original observational population (red). The three subplots showed the ACs between covariates and PA and the corresponding pollutants before and after weighting with the bi-dimensional GPS model constructed for PA and PM10, PA and PM2.5, and PA and PM1, respectively. Covariates were age, sex, marital status, education, annual household income, BMI, smoking, aMED score, sedentary time, etc., as detailed in the Methods