An analysis: Colon cancer mortality in Tianjin, China, from 1981 to 2000

Table 2 Trend of mean age at death due to colon cancer in Tianjin, from 1981 to 2000.

Year	Male			Female			Total
	Mean	SD	SE	Mean	SD	SE	Mean	SD	SE
1981	58.7	13.94	2.2	66.31	8.48	1.22	62.85	11.85	1.26
1982	57.81	16.49	2.92	64.42	14.24	2.17	61.6	15.49	1.79
1983	59.12	11.69	1.83	64.15	14.14	1.83	62.11	13.37	1.33
1984	59.53	16.5	2.92	59	16.86	2.43	59.21	16.61	1.86
1985	62.64	12.63	1.84	61.75	16.66	2.63	62.23	14.54	1.56
1986	59.28	15.7	2.31	62.76	12.37	1.67	61.18	14.02	1.4
1987	57.63	16.24	2.4	62.49	13.36	2.14	59.86	15.1	1.64
1988	63.57	10.99	1.7	60.56	12.28	1.74	61.93	11.75	1.22
1989	61.65	14.97	2.04	62.04	15.03	2.22	61.83	14.92	1.49
1990	63.85	13.5	1.87	63.78	13.71	1.87	63.81	13.54	1.32
1991	63.39	13.04	1.73	65.75	12.06	1.91	64.36	12.63	1.28
1992	64.65	12.88	1.84	65.05	12.3	1.62	64.87	12.51	1.21
1993	67.83	10.77	1.49	64.16	13.25	1.62	65.76	12.32	1.13
1994	64.17	12.16	1.38	65.89	12.91	1.48	65.02	12.53	1.01
1995	65.13	12.85	1.56	65.07	11.2	1.5	65.1	12.09	1.09
1996	65.21	12.25	1.5	65.81	11.99	1.56	65.49	12.08	1.08
1997	64.56	14.19	1.8	69.82	12.56	1.47	67.41	13.54	1.17
1998	67.41	10.9	1.4	65.19	11.66	1.48	66.29	11.3	1.02
1999	68.06	13.44	1.67	66.29	13.51	1.63	67.15	13.45	1.16
2000	67.22	11.69	1.65	66.13	14.79	1.86	66.61	13.46	1.27
Total	63.57	13.52	0.42	64.59	13.31	0.4	64.1	13.42	0.29

Comparison of mean age at death between sexes: t = -1.75, P = 0.0796.