Table 4.
Investigating the dependence of mean URR on high exposures.
| All studies
|
Coke, gas, aluminum
|
|||||
|---|---|---|---|---|---|---|
| Exclusions | na | URR (95% CI) | p(het)b | na | URR (95% CI) | p(het)b |
| No exclusions | 39 | 1.20 (1.11–1.29) | < 0.001 | 22 | 1.17 (1.12–1.22) | 0.20 |
| > 80 μg/m3 | 34 | 3.46 (2.03–5.90) | < 0.001 | 17 | 1.88 (1.22–2.91) | 0.02 |
| > 40 μg/m3 | 30 | 6.49 (1.99–21.12) | < 0.001 | 14 | 2.42 (0.56–10.40) | 0.01 |
| > 20 μg/m3 | 21 | 4.54 (1.26–16.30) | > 0.20 | 7 | 1.87 (0.24–14.22) | > 0.20 |
aRemaining number of studies from which URRs could be estimated.
bTest for heterogeneity between URRs.