Meta-analytic summary estimates by cause of death
| Cause of death | Study citation | Number of estimates | HR (95% CI) | I2 (%)* |
|---|---|---|---|---|
| All year | ||||
| All causes | 9 15 29 30 34 36 | 7† | 0.96 (0.92 to 1.00) | 81 |
| Cardiovascular | 9 12 32 36 | 5† | 0.98 (0.93 to 1.04) | 55 |
| Ischaemic heart disease | 9 29 36 | 3 | 1.00 (0.92 to 1.09) | 72 |
| Cardiopulmonary | 15 29 30 | 4† | 0.98 (0.90 to 1.07) | 59 |
| Respiratory | 9 10 36 | 3 | 0.94 (0.81 to 1.10) | 84 |
| Lung cancer | 9 15 29 30 36 | 6† | 0.95 (0.83 to 1.08) | 55 |
| Warm season/peak ozone | ||||
| All causes | 29 34 36 37 | 4 | 1.00 (0.99 to 1.02) | 46 |
| Cardiovascular | 26 36 37 | 3 | 1.01 (1.00 to 1.02) | 0 |
| Respiratory | 26 36 37 | 3 | 1.03 (1.01 to 1.05) | 0 |
HRs expressed per 10 ppb increase in O3.
*I2 statistic.
†Separate estimates for male and female members of AHSMOG cohort; hence, number of cohorts is one less that the number of estimates in the meta-analysis.