Time trends of incidence of digestive system cancers in changle of China during 1988-2002

Table 2 Incidence of four tumors both in men and women in Changle from 1988 to 2002 (%)

Disease	Men			Women
	Regression coefficient	R2	P	Regression coefficient	R2	P
Stomach cancer	3.16	0.851	< 0.001	0.72	0.415	0.009
Liver cancer	0.83	0.286	0.04	0.16	0.061	0.374
Esophagus cancer	1.33	0.736	< 0.001	0.48	0.567	0.001
Colorectal cancer	0.29	0.391	0.013	0.12	0.1	0.251