Table 2.
Results of meta-analyses stratified according to selected characteristics
| Characteristic | N risk estimatesc | RR (95% CI) | p-het | |
|---|---|---|---|---|
| Type of asbestos fiber | Amosite | 6 | 1.00 (0.74–1.35) | 0.43 |
| Chrysotile | 16 | 1.07 (0.81–1.41) | ||
| Unspecified | 21 | 1.17 (0.96–1.43) | ||
| Geographic region | North America | 9 | 1.45 (1.14–1.85) | 0.13 |
| Europe | 29 | 1.05 (0.90–1.22) | ||
| Others | 5 | 1.15 (0.77–1.72) | ||
| Gender | Men | 31 | 1.08 (0.96–1.21) | 0.10 |
| Women | 2 | 1.10 (0.27–4.42) | ||
| Mixed | 10 | 1.12 (0.85–1.47) | ||
| Year of first employment | < 1945 | 21 | 1.09 (0.90–1.32) | 0.001 |
| 1945–1960 | 9 | 1.47 (1.09–1.99) | ||
| > 1960 | 10 | 0.97 (0.85–1.12) | ||
| Not specified | 3 | 1.27 (0.76–2.13) | ||
RR, meta-relative risk, based on random-effects model; CI, confidence interval; p-het, p-value of test for heterogeneity of strata-specific RR
cCohort-specific results based on 0 observed events are excluded from the meta-analys