Estimated cumulative chlorinated solvent exposure (ppm-years) and risk of glioma, according to respondent status, including unexposed participants
| Chlorinated solvents* | Including proxy-only interviews | Excluding proxy-only interviews | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cases (n=798) | Controls (n=1175) | OR†‡ | 95% CI | Cases (n=438) | Controls (n=1141) | OR | 95% CI | |||||||||
| Mean | SD | Max | Mean | SD | Max | Mean | SD | Max | Mean | SD | Max | |||||
| Carbon tetrachloride | 6.0 | 27.6 | 373.3 | 7.3 | 34.4 | 784.5 | 0.98 | 0.96 to 0.99 | 5.7 | 29.5 | 373.3 | 7.1 | 34.1 | 784.5 | 0.98 | 0.96 to 1.00 |
| Chloroform | 10.4 | 45.6 | 640.5 | 12.4 | 58.2 | 1337.0 | 0.98 | 0.96 to 0.99 | 10.0 | 47.4 | 640.5 | 12.0 | 57.6 | 1337.0 | 0.98 | 0.96 to 1.00 |
| Methylene chloride | 30.1 | 126.2 | 1414.0 | 29.9 | 129.8 | 2952.0 | 0.98 | 0.97 to 0.99 | 30.9 | 143.2 | 1414.0 | 29.2 | 128.7 | 2952.0 | 0.98 | 0.96 to 1.00 |
| Tetrachloroethylene | 1.3 | 5.4 | 60.8 | 1.3 | 5.6 | 126.9 | 0.97 | 0.95 to 0.99 | 1.3 | 6.1 | 60.8 | 1.3 | 5.6 | 126.9 | 0.97 | 0.95 to 0.99 |
| Trichloroethane | 7.9 | 34.7 | 413.7 | 8.8 | 40.7 | 853.5 | 0.97 | 0.96 to 0.99 | 8.3 | 38.2 | 413.7 | 8.7 | 40.5 | 853.5 | 0.97 | 0.95 to 0.99 |
| Trichloroethylene | 32.5 | 209.2 | 4046.0 | 43.3 | 296.1 | 5765.0 | 0.98 | 0.96 to 0.99 | 31.5 | 190.3 | 2512.0 | 39.9 | 284.2 | 5765.0 | 0.98 | 0.96 to 0.99 |