Table 4.
Comparison of Methods for Estimating Excess Respiratory and Cardiovascular Hospital Admissions and Fire‐Originated PM2.5 Exposure, October 8–20, 2017
| Impact assessment method | # Admissions (95% CI) | Fire‐originated PM2.5 (µg/m3) a | ||||||
|---|---|---|---|---|---|---|---|---|
| Total PM2.5 estimation | Background PM2.5 estimation | CRF type | Respiratory | Cardiovascular | Population‐weighted average (Std. Dev.) | Spatial average (Std. Dev.) | 95th percentile | |
| 1 b | BME data fusion | CMAQ % attributable | WF c | 240 (114, 404) | 68 (−10, 159) | 10.05 (6.58) | 7.05 (9.81) | 26.59 |
| 2 | CC‐CMAQ | CMAQ % attributable | WF | 251 (77, 620) | 70 (−10, 211) | 9.84 (6.10) | 6.56 (9.63) | 27.47 |
| 3 | BME kriging | CMAQ % attributable | WF | 280 (124, 512) | 78 (−12, 192) | 11.02 (7.08) | 8.19 (11.17) | 26.40 |
| 4 | BME data fusion | October 2016 | WF | 299 (126, 544) | 84 (−13, 208) | 8.77 (7.50) | 6.56 (8.48) | 22.65 |
| 5 | BME data fusion | CMAQ % attributable | NF d | 177 (87, 305) | 163 (95, 261) | 10.05 (6.58) | 7.05 (9.81) | 26.59 |
The population‐weighted average and standard deviation, spatial average and standard deviation, and 95th percentile of the 1‐km resolution fire‐originated PM2.5 estimations across central California.
Base case impact assessment.
Wildfire‐specific CRFs (rate ratio per 10 μg/m3 increase in 2‐day average PM2.5)—respiratory: 1.028 (95% CI: 1.014, 1.041); cardiovascular: 1.008 (95% CI: 0.999, 1.018) (Delfino et al., 2009).
Nonwildfire‐specific CRFs (rate ratio per 10 μg/m3 increase in 2‐day average PM2.5)—respiratory: 1.021 (95% CI 1.012, 1.030); cardiovascular: 1.019 (95% CI: 1.013, 1.025) (Zanobetti et al., 2009).