Table 4 Mortality RRs (95% CI) associated with a 10 ppb increase in different O3 exposure measures

From: Long-term ozone exposures and cause-specific mortality in a US Medicare cohort

Cause of death1-h Maxa O38-h Maxa O324-h Averagea O3
All-cause1.004 (1.003–1.006)1.002 (1.001–1.003)0.990 (0.988–0.991)
  Accidental1.010 (1.002–1.017)1.018 (1.009–1.027)1.025 (1.014–1.036)
All cardiovascular1.005 (1.003–1.007)0.997 (0.995–0.999)0.973 (0.970–0.975)
  Ischemic heart disease1.008 (1.006–1.011)0.996 (0.993–0.999)0.964 (0.960–0.967)
  Cerebrovascular disease0.993 (0.989–0.997)0.987 (0.982–0.991)0.968 (0.962–0.974)
  Congestive heart failure1.063 (1.055–1.071)1.072 (1.063–1.080)1.066 (1.056–1.077)
All respiratory1.030 (1.027–1.034)1.033 (1.030–1.037)1.021 (1.016–1.026)
  COPD1.072 (1.067–1.077)1.084 (1.079–1.089)1.084 (1.077–1.091)
  Pneumonia0.990 (0.984–0.996)0.978 (0.972–0.985)0.935 (0.927–0.944)
All cancer0.995 (0.993–0.998)0.993 (0.990–0.995)0.983 (0.980–0.986)
  Lung cancer1.015 (1.010–1.020)1.016 (1.011–1.021)1.007 (1.000–1.014)
  1. Time period: 2000 – 2008, USA
  2. RR risk ratio, CI confidence interval, IHD ischemic heart disease, CBV cerebrovascular disease, CHF congestive heart failure, COPD chronic obstructive pulmonary disease
  3. Risk ratios are age, gender and race stratified, and adjusted for state of residence and 1-year moving average PM2.5 exposures
  4. aWarm-season average of daily ozone concentrations