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Table 4 The effects of bromoform, chlorodibromethane, and bromodichloromethane on risk of rectal cancer.

From: Case control study of the geographic variability of exposure to disinfectant byproducts and risk for rectal cancer

  Bromoform Chlorodibromo-methane Bromodichloro-methane Chloroform
  OR 95% CI p OR 95% CI p OR 95%CI p OR 95%CI p
Alcohol (1000 oz./month) 1.77 (1.16 – 2.70) 0.008 1.65 (1.10–2.47) .005 1.68 (1.12–2.52) 0.012 1.63 (1.09 – 2.44) 0.018
Betacarotene (10,000 IU/month) 0.56 (0.41–0.76) <0.001 0.65 (0.50–0.84) 0.001 0.64 (0.50–0.84) 0.001 0.64 (0.49–0.83) <0.001
Total Calories (10,000/month) 1.22 (1.05–1.40) 0.005 1.27 (1.14–1.42) <0.001 1.26 (1.13–1.42) <0.001 1.27 (1.14–1.42) <0.001
Tap water (liters) 0.94 (0.73–1.20) 0.601 1.07 (0.45–2.59) 0.880 0.99 (0.83–1.16) 0.900 1.05 (0.52–2.12) 0.887
THM estimate (ug/l) 1.20 (1.05–1.35) 0.007 1.16 (0.85–1.58) 0.173 0.93 0.82–1.13) 0.465 1.00 (0.93–1.09) 0.777
THM consumption (ug/day) 1.85 (1.25–2.74) 0.002 1.78 (1.00–3.19) 0.052 1.15 (1.00–1.32) 0.047 1.00 (0.98–1.02) 0.908
  1. "THM estimate" and "THM consumption" refer to the effects of individual THM components specified in each column.