Table 5 Joint ever exposure to silica and asbestos at work and bladder cancer risk, NECSS 1994–1997
| Cases | Controls | ||||
|---|---|---|---|---|---|
| N | % | N | % | OR (95% CI) a | |
| Unexposed | 335 | 50.9 | 832 | 61.2 | 1.00 |
| Ever exposed to silica but not asbestos | 203 | 30.9 | 377 | 27.7 | 1.20 (0.93 – 1.54) |
| Ever exposed to asbestos but not silica | 69 | 10.5 | 97 | 7.1 | 1.33 (0.92 – 1.92) |
| Ever exposed to both | 51 | 7.8 | 54 | 4.0 | 1.67 (1.06 – 2.62) |