Table 7.
Comparison of estimated citywide annual burden of PM2.5 using quarterly and annual average incidence rates
| Attributable counts | Attributable rate per 100,000 persons | ||||
|---|---|---|---|---|---|
| Health effect | Risk estimate | Annual estimate derived from quarterly rates (95 % CI) | Annual estimate derived from annual incidence rate (95 % CI) | Annual estimate derived from quarterly rates (95 % CI) | Annual estimate derived from annual incidence rate (95 % CI) |
| Mortality (above 30) | Annual risk estimate in both cases | 3,180 (2,200, 4,130) | 3,230 (2,240, 4,200) | 64 (45, 83) | 66 (44, 86) |
| Hospital admissions—all cardiovascular causes (above 40) | Seasonal risk estimates for quarterly rates, year-round risk estimates for annual rates | 920 (210, 1,630) | 990 (490, 1,500) | 25 (5.8, 45) | 28 (14, 41) |
| Hospital admissions—all respiratory causes (above 20) | 1,200 (460, 1,930) | 1,190 (690, 1,670) | 20 (7.5, 31) | 20 (11, 28) | |
| Emergency department visits for asthma (all ages) | 6,000 (3,650, 8,300) | 5,700 (4,000,7,390) | 72 (44, 100) | 69 (48, 90) | |