Table 4. Modification of the excess relative risk of stomach cancer in the study cohort associated with external gamma ray exposure by non-radiation factors (both sexes, SmSta-adj model).
| Factors | Number of cases | ERRed/Gy | ||
|---|---|---|---|---|
| Unadjusted for internal alpha-radiation exposure | Adjusted for internal alpha-radiation exposure | |||
| Sex | Males | 280 | 0.21 (0.01, 0.50) | 0.19 (-0.02, 0.49) |
| Females | 63 | 0.10 (-0.38W, 0.74) | 0.09 (-0.39W, 0.74) | |
| p value (test for heterogeneity) | > 0.50 | > 0.50 | ||
| Age | < 50 | 78 | 0.36 (-0.05, 1.14) | 0.26 (-0.12, 1.03) |
| 50–60 | 89 | 0.76 (0.17, 1.90) | 0.80 (0.17, 2.04) | |
| 60–70 | 89 | 0.12 (-0.13, 0.57) | 0.09 (-0.16, 0.57) | |
| 70+ | 87 | -0.06 (-0.32W, 0.24) | -0.07 (-0.35W, 0.26) | |
| p value (test for heterogeneity) | 0.069 | 0.084 | ||
| p value (trend) | 0.143 | 0.248 | ||
| Smoking | Non-smokers | 111 | 0.07 (-0.28W, 0.49) | 0.08 (-0.29W, 0.52) |
| Former smokers | 67 | 0.01 (-0.29W, 0.43) | -0.06 (-0.35W, 0.38) | |
| Smokers | 159 | 0.45 (0.11, 1.00) | 0.44 (0.08, 1.02) | |
| Unknown | 6 | 1.49 (-3.32W, 27.99) | 0.75 (-2.94W, 25.02) | |
| p value (heterogeneity test) | 0.280 | 0.282 | ||
| Alcohol consumption | Non-drinkers | 65 | 0.24 (-0.32W, 1.01) | 0.24 (-0.33W, 1.03) |
| Moderate drinkers | 153 | 0.17 (-0.08, 0.57) | 0.15 (-0.10, 0.55) | |
| Heavy drinkers | 89 | 0.13 (-0.09, 0.53) | 0.11 (-0.14, 0.53) | |
| Unknown | 36 | 0.50 (-0.57W, 2.80) | 0.59 (-0.62W, 3.31) | |
| p value (heterogeneity test) | > 0.50 | > 0.50 | ||
| Stomach ulcer | No | 312 | 0.19 (0.01, 0.45) | 0.18 (-0.02, 0.46) |
| Yes | 31 | 0.19 (-0.48W, 1.38) | 0.14 (-0.50W, 1.20) | |
| p value (heterogeneity test) | > 0.50 | > 0.50 | ||
| Duodenal ulcer | No | 326 | 0.20 (0.01, 0.45) | 0.21 (0.01, 0.49) |
| Yes | 17 | 0.16 (-0.67W, 2.66) | -0.10 (-0.57W, 0.70W) | |
| p value (heterogeneity test) | > 0.50 | 0.345 | ||
| Gastritis and duodenitis | No | 149 | 0.23 (-0.03, 0.64) | 0.24 (-0.05, 0.70) |
| Yes | 194 | 0.17 (-0.05, 0.49) | 0.13 (-0.08, 0.46) | |
| p value (heterogeneity test) | > 0.50 | > 0.50 | ||
W denotes that an estimate was based on Wald’s statistics if a bound of a confidence interval was not defined.