Original Research
Copyright ©The Author(s) 1997.
World J Gastroenterol. Mar 15, 1997; 3(1): 47-49
Published online Mar 15, 1997. doi: 10.3748/wjg.v3.i1.47
Table 7 Relationship between different kinds of drinking water and the incidence of liver cancer
Type of drinking waterIncidence of liver cancer(/100 thousand)RR
Pond water82.56b2.34
Well water by the ponds75.85b2.17
Well water63.12a1.80
River water45.69a1.31
Tap water35.011.00