Table 22 Kidney cancer; meta-analysis results
From: Systematic review of the relation between smokeless tobacco and cancer in Europe and North America
| Â | Â | Â | Â | Heterogeneity | ||
|---|---|---|---|---|---|---|
Type of ST (region)a | Adjustments/restrictionsb | Number of estimates (RR/OR ids)c | Random-effects RR/OR (95% CI) | χ2 | I2 | P(χ2) |
Any | Overall data | 11 (3, 4, 8, 9, 10, 13, 14, 15, 17, 18, 19) | 1.23 (0.86–1.76)d | 16.5 | 39.2 | 0.087 |
|  | Smoking-adjusted | 5 (3, 5, 13, 17, 19) | 1.09 (0.69–1.71)e | 6.9 | 41.9 | 0.142 |
|  | Never smokers | 2 (5, 17) | 2.19 (0.63–7.70) | 2.5 | 59.6 | 0.116 |
Any (USA) | Overall data | 8 (4, 9, 10, 13, 14, 15, 18, 19) | 1.52 (0.94–2.46) | 11.1 | 37.1 | 0.133 |
|  | Smoking-adjusted | 3 (5, 13, 19) | 1.41 (0.64–3.10) | 4.2 | 51.8 | 0.125 |
|  | Never smokers | 1 (5) | 4.80 (1.18–19.56) | -- | -- | -- |
Snuff (Scandinavia)f | Overall data | 1 (3) | 0.72 (0.44–1.18) | -- | -- | -- |
|  | Smoking-adjusted | 1 (3) | 0.72 (0.44–1.18) | -- | -- | -- |