Table 4.
PM 2.5 | BC | |||||
---|---|---|---|---|---|---|
Pooled | Warm season (Apr-Sep) | Cold season (Mar-Oct) | Pooled | Warm season (Apr-Sep) | Cold season (Mar-Oct) | |
Moving average | β (95% CI) | β (95% CI) | β (95% CI) | β (95% CI) | β (95% CI) | β (95% CI) |
1-week | 0.80 (0.15, 1.44) | 0.43 (-0.43, 1.29) | 1.34 (0.38, 2.30) | 0.32 (-0.04, 0.68) | 0.03 (-0.55, 0.62) | 0.48 (0.03, 0.92) |
2-week | 1.07 (0.43, 1.71) | 0.56 (-0.33, 1.46) | 1.78 (0.83, 2.74) | 0.28 (-0.09, 0.64) | 0.04 (-0.53, 0.62) | 0.41 (-0.04, 0.86) |
4-week | 0.96 (0.41, 1.51) | 0.31 (-0.47, 1.08) | 1.79 (0.93, 2.65) | 0.30 (-0.06, 0.67) | 0.06 (-0.51, 0.62) | 0.46 (-0.00, 0.92) |
Abbreviations: PSS 14-item Perceived Stress Scale, PM 2.5 particulate matter with an aerodynamic diameter of <2.5 μm, BC black carbon.
*As estimated in linear mixed effect regression with random intercept for participant adjusting for seasonality, weekday of visit, 24-hour mean apparent temperature, age, race, years of education, use of anti-depressant medication, and physical activity; associations for warm and cold months are estimated from interactions between warm/cold season and moving average exposure.