Table 3 Summary of individual and meta‐analysis results for Group I.
| Author(s) and year | Type of risk estimate | Number of exposed cases or deaths | Risk estimate | 95% CI |
|---|---|---|---|---|
| Cohort studies from multiple industries (Europe) | ||||
| Anttila et al, 199528* | SIR | 8 | 1.81 | 0.78 to 3.56 |
| Axelson et al, 199427* | SIR | 5 | 1.52 | 0.49 to 3.54 |
| Hansen et al, 200125* | SIR | 8 | 3.50 | 1.50 to 6.90 |
| Raaschou‐Nielsen et al, 200326* | SIR | 65 | 1.50 | 1.20 to 2.00 |
| Summary risk estimate: random effects model | SRRE | 86 | 1.86 | 1.27 to 2.71 |
| Test for heterogeneity | p = 0.159 | |||
| Cohort studies involving aerospace and aircraft industry (USA) | ||||
| Blair et al, 199829† | RR | 28 | 2.00 | 0.90 to 4.60 |
| Boice et al, 199935‡ | SMR | 14 | 1.19 | 0.65 to 1.99 |
| Morgan et al, 199830§ | SMR | 9 | 1.01 | 0.46 to 1.92 |
| Summary risk estimate: random effects model | SRRE | 51 | 1.25 | 0.87 to 1.79 |
| Test for heterogeneity | p = 0.431 | |||
| Overall summary risk estimate: random effects model | SRRE subcohorts | 137 | 1.59 | 1.21 to 2.08 |
| SRRE total cohorts | 429 | 1.29 | 1.0 to 1.66 | |
| Overall test for heterogeneity | ||||
| Sub‐cohorts | p = 0.181 | |||
| Total cohorts | p = 0.0001 | |||
Ritz (1999) included in overall SRRE but not in sub‐cohort (number of exposed cases = 10; SMR = 1.03; 95% CI 0.49 to 1.89).
*Results based on ICD‐7 codes 200 and 202.
†Results based on ICD‐8 codes 200 and 202.
‡Results based on ICD‐9 codes 200 and 202.
§Results based on ICD‐7, ‐8, ‐9 codes 200 and 202 (as per the version in use at the time of death).