Fig. 3: Percent change in hospitalization rate for heart failure associated with 1-μg/m3 increase in long-term exposure to air pollution at low concentrations in stratified analyses in three-pollutant models using double negative control adjustment.

Statistical significance is calculated via a two-tailed t-test (*P < 0.05, **P < 0.01, ***P < 0.001). Error bars indicate the 95% confidence intervals. Source data are provided as a Source Data file.