Table 4.
Adjusted estimated percent increase [ERR (95% CI)] of emergency respiratory hospital admissions associated with an IQR increase in PM concentrations.a
| 1st–99th percentile PMc onlyc | In TW residents onlyd | Additionally adjusted for pollutantb | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pollutant | NO2 | SO2 | O3 | |||||||
| Single-pollutant model | ||||||||||
| PMc | 2.37 (1.51, 3.24) | 2.66 (1.33, 4.02) | 1.58 (0.86, 2.30) | 1.96 (1.26, 2.67) | 1.85 (1.15, 2.56) | |||||
| PM2.5 | 2.55 (1.67, 3.43) | 3.02 (1.42, 4.65) | 1.98 (1.04, 2.94) | 2.74 (1.87, 3.63) | 2.43 (1.55, 3.32) | |||||
| Two-pollutant model | ||||||||||
| PMc | 1.32 (0.23, 2.42) | 1.78 (0.11, 3.47) | 1.07 (0.21, 1.94) | 1.02 (0.16, 1.89) | 1.08 (0.22, 1.95) | |||||
| PM2.5 | 1.70 (0.59, 2.82) | 1.72 (–0.26, 3.74) | 1.19 (0.05, 2.33) | 1.97 (0.89, 3.06) | 1.62 (0.53, 2.71) | |||||
| aThe effects of 4-day moving averages (current day to previous 3 days, lag03) of daily average PM concentrations were estimated in GAMs, adjusting for time trend, weather conditions, day of week, public holidays, and influenza outbreaks. IQRs: PMc, 10.9 μg/m3; PM2.5, 26.3 μg/m3. bAnalysis covered the entire range of PMc concentration and citywide respiratory admissions. cAnalysis restricted to 1st–99th percentiles (6.42–42.96 μg/m3) of PMc concentration. dAnalysis restricted to hospital admissions in TW residents. | ||||||||||