Table 1.

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

	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)