Table 1.
Exposure–response estimates (lnRR for a 1-μg/m3 increase in EC) from individual studies and the primary combined estimate based on a log-linear model.
| Modela | Intercept | β (95%CI) |
|---|---|---|
| All studies combined | 0.088 | 0.00098 (0.00055, 0.00141) |
| Silverman et al. (2012) only | –0.18 | 0.0012 (0.00053, 0.00187) |
| Steenland et al. (1998) only | –0.032 | 0.00096 (0.00033, 0.00159) |
| Garshick et al. (2012) only | 0.24 | 0.00061 (–0.00088, 0.00210) |
| aLog-linear risk model (lnRR = intercept + β × exposure). Exposure defined as EC in μg/m3-years. | ||