From: Systematic review of the relation between smokeless tobacco and cancer in Europe and North America
 | Overall data* | Never smokers | ||
---|---|---|---|---|
Cancer (source) | n | RR/OR (95% CI) | N | RR/OR (95% CI) |
Oropharyngeal (Table 4) | 7 | 0.97 (0.68–1.37) | 4 | 1.01 (0.71–1.45) |
Oesophageal (Table 6) | 4 | 1.10 (0.92–1.33) | 1 | 1.92 (1.00–3.68) |
Stomach (Table 8) | 5 | 0.98 (0.82–1.17) | 2 | 0.90 (0.35–2.30) |
Pancreatic (Table 10) | 2 | 1.20 (0.66–2.20) | 2 | 1.61 (0.77–3.34) |
Larynx (Table 14) | 1 | 0.90 (0.50–1.50) | 0 | - |
Lung (Table 16) | 2 | 0.71 (0.66–0.76) | 2 | 0.82 (0.52–1.28) |
Bladder (Table 20) | 1 | 0.83 (0.62–1.11) | 0 | - |
Kidney (Table 22) | 1 | 0.72 (0.44–1.18) | 0 | - |
Non-Hodgkin's lymphoma (Table 24) | 2 | 1.04 (0.54–1.98) | 1 | 0.77 (0.59–1.01) |
Overall cancer (Table 27) | 2 | 1.03 (0.91–1.16) | 2 | 1.10 (0.94–1.29) |