Table 2.
Results From a Meta-Analysis of Associations Between Ozone Exposure and Mortality, by Sex, 1988–2013
| I2 (Uncertainty Parametera), % | 95% CI | P Value (Egger's Regression Test) | Overall Risk Estimate,b % | 95% CI | Overall Estimate Adjusted for Publication Bias,b % | 95% CI | No. of Adjusted Estimates | |
|---|---|---|---|---|---|---|---|---|
| Men | 26.4 | 0.0, 65.6 | 0.02 | 0.73 | 0.40, 1.07 | 0.64 | 0.31, 0.98 | 2 |
| Women | 64.7 | 27.8, 82.7 | 0.003 | 1.12 | 0.62, 1.63 | 1.12 | 0.62, 1.63 | 0 |
| Women vs. menc | 0.39 | –0.22, 1.00 | 0.48 | –0.13, 1.09 |
Abbreviation: CI, confidence interval.
a Percentage of variance in observed study results explained by heterogeneity.
b Percent increase in risk for a 10-ppb increase in 8-hour ozone concentration.
c Percent increase in ozone risk estimates for women compared with men.