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Table 1 Background information (mean, standard deviation) for cases and controls

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

  Cases (128) Controls (253)
Age(yrs) 64.3(± 9.0) 64.4(± 9.6)
Education (yrs) 12.1(± 3.0) 12.4(± 3.3)
Height(cm) 172.7(± 7.1) 173.7(± 7.3)
Weight(kg) 79.1(± 13.2) 79.2(± 12.1)
Daily tap water drinking volume (l) 1.9(± 0.9) 1.8(± 0.9)
Total yrs. Public water 56.3(± 17.3) 60.2(± 15.3)
% life at present water source 88(± 1.8) 91(± 1.1)