Table 2. Pooled analysis for stomach cancer mortality and incidence by exposure lag (latency) and type of outcome using random effects model.
Outcome | na | SMR | 95% CI | τ2 b | PQc | I2 (%)d | |
---|---|---|---|---|---|---|---|
Men | |||||||
All exposure lags | I | 14 | 1.09 | (0.94–1.26) | 0.019 | 0.16 | 28.0 |
M | 30 | 1.16 | (1.00–1.34) | 0.085 | <0.001 | 63.5 | |
M+I | 44 | 1.13 | (1.02–1.26) | 0.057 | <0.001 | 54.7 | |
At least 10 yr exposure lag | I | 2 | – | – | – | – | – |
M | 9 | 1.16 | (0.79–1.69) | 0.213 | <0.001 | 75.3 | |
M+I | 11 | 1.09 | (0.77–1.53) | 0.197 | <0.001 | 71.8 | |
No exposure lag | I | 14 | 1.09 | (0.94–1.26) | 0.019 | 0.16 | 28.0 |
M | 26 | 1.18 | (0.99–1.40) | 0.111 | <0.001 | 69.6 | |
M+I | 40 | 1.14 | (1.01–1.28) | 0.069 | <0.001 | 59.7 | |
Women | |||||||
All exposure lags | I | 6 | 1.1 | (0.52–2.33) | 0 | 0.99 | – |
M | 13 | 0.93 | (0.67–1.30) | 0 | 0.90 | 0 | |
M+I | 19 | 0.96 | (0.71–1.30) | 0 | 0.99 | – | |
No exposure lag | I | 6 | 1.1 | (0.52–2.33) | 0 | 0.99 | – |
M | 12 | 0.89 | (0.62–1.26) | 0 | 0.90 | 0 | |
M+I | 18 | 0.92 | (0.67–1.27) | 0 | 0.99 | – | |
Total cohort | |||||||
All exposure lags | I | 15 | 1.07 | (0.91–1.25) | 0.022 | 0.26 | 25.5 |
M | 40 | 1.17 | (1.03–1.33) | 0.087 | <0.001 | 69.1 | |
M+I | 55 | 1.15 | (1.03–1.27) | 0.069 | <0.001 | 61.9 | |
At least 10 yr exposure lag | I | 0 | – | – | – | – | – |
M | 10 | 1.12 | (0.80–1.56) | 0.182 | <0.001 | 81.6 | |
M+I | 12 | 1.07 | (0.79–1.44) | 0.169 | <0.001 | 78.5 | |
No exposure lag | I | 15 | 1.07 | (0.91–1.25) | 0.022 | 0.26 | 25.5 |
M | 36 | 1.18 | (1.03–1.36) | 0.102 | <0.001 | 72.7 | |
M+I | 51 | 1.15 | (1.03–1.28) | 0.078 | <0.001 | 64.8 |
Abbreviations: – = not applicable; CI=confidence interval; I=incidence, M=mortality.
No results for women for at least 10 year exposure lag as only one mortality study reported a SMR.
Number of cohorts included.
Variance (amount of heterogeneity).
P-value for the heterogeneity test.
Percentage of total variability due to heterogeneity.