Effects of different fractions of PM10 on emergency hospital admissions for pneumonia by lags in single pollutant models, 2011–2012* (ER% (95% CI) for 10 μg/m3 increment of PM)
| Lag days | PMc | PM2.5 |
|---|---|---|
| Lag0 | 1.06 (−0.22 to 2.35) | 0.68 (−0.07 to 1.43) |
| lag1 | 1.57 (0.42 to 2.73) | 0.72 (0.00 to 1.44) |
| lag2 | 1.83 (0.70 to 2.97) | 0.85 (0.15 to 1.56) |
| lag3 | 1.76 (0.65 to 2.88) | 1.15 (0.46 to 1.84) |
| lag4 | 1.14 (0.03 to 2.26) | 1.47 (0.80 to 2.14) |
| lag5 | 1.07 (−0.03 to 2.19) | 0.89 (0.22 to 1.57) |
| lag6 | 0.82 (−0.27 to 1.93) | 0.34 (−0.33 to 1.02) |
| dlm03† | 3.33 (1.54 to 5.15) | 1.69 (0.68 to 2.70) |
| dlm46† | 0.97 (−0.65 to 2.62) | 1.16 (0.20 to 2.14) |
*Generalised additive Poisson models were used, adjusting for long-term trend, seasonality, weather factors, calendar effect and influenza epidemics.
†Overall cumulative effects of DTR lasting for 0–3 (dlm03) and 4–6 days (dlm46) were estimated by unconstrained distributed lag models. Statistically significant effect estimates are in bold.
ER, excess risk; PM2.5, particles with an aerodynamic diameter less than 2.5 μm; PMc, coarse particulate matter.