Summary statistics for asbestos exposure and incidence or mortality from ovarian cancer
| Number of studies | Number of cases | Fixed-effects size (95% CI) | Random-effects size (95% CI) | Heterogeneity, χ2 | Heterogeneity, degrees of freedom | Heterogeneity, P | |
|---|---|---|---|---|---|---|---|
| All studies combined | 16 | 5,240 | 1.75 (1.45–2.10) | 1.80 (1.45–2.24) | 17.91 | 15 | 0.268 |
| Cohort studies only | 14 | 5,165 | 1.75 (1.45–2.12) | 1.83 (1.44–2.33) | 17.61 | 13 | 0.173 |
| Case–control studies only | 2 | 75 | 1.69 (0.76–3.73) | 1.69 (0.76–3.73) | 0.29 | 1 | 0.593 |
| All studies that reviewed ovarian pathology | 7 | 5,186 | 1.54 (1.22–1.95) | 1.54 (1.22–1.95) | 5.72 | 6 | 0.455 |
| Cohort studies that reviewed ovarian pathology | 5 | 5,102 | 1.53 (1.20–1.95) | 1.59 (1.17–2.15) | 5.38 | 4 | 0.251 |
| Studies that examined cancer incidence | 4 | 5,158 | 1.29 (0.97–1.73) | 1.29 (0.97–1.73) | 1.08 | 3 | 0.781 |