| ST usea |  |  |  |  |  | |
---|---|---|---|---|---|---|---|
Ref | Type | Exposure | Inclusion of smokersb | Reviewc | Sex | Relative risk (95% CI) | Comments |
[31] | ST | Ever | NS | L&H | F | 6.80 (1.60–28.5) | Not included by B |
[3] | ST | Current | NS | L&H | M | 1.08 (0.64–1.83) |  |
(CPS-I) | ST | Current | NS | B | M | 1.1 (0.6–1.8) | Estimates agreed |
[3] | ST | Ever | NS | L&H | M | 1.77 (1.14–2.74)e |  |
(CPS-II) | ST | Current | NS | B | M | 2.0 (1.2–3.2) | Current not ever exposure |
[4] | Snuff | Ever | SNS | L&H | M | 0.80 (0.61–1.05) | Estimate for NS also available |
 | Snuff | Ever | SNS | B | M | 0.8 (0.6–1.1) | Estimates agreed |
[5] | Snuff | Ever | SNS | L&H | M | 0.7 (0.6–0.7) |  |
 | Snuff | Ever | NS | B | M | 0.8 (0.5–1.3) | NS not SNS |
[27] | ST | Ever | SNS | L&H | M | 0.69 (0.47–1.00)e | Not included by B |
Total |  |  |  | L&H |  | 0.99 (0.71–1.37) | 6 estimates |
 |  |  |  | B |  | 1.2 (0.7–1.9) | 5 estimatesf |