Table 3.

Observed Survival Rate and Relative Survival Rate of Liver Cancer by Period in Qidong, 1972–2016 (%)

Period	n	Observed Survival (OS)			Relative Survival (RS)
		1-Yr	5-Yr	10-Yr	1-Yr	5-Yr	10-Yr
1972–1976	2937	16.11	2.32	0.95	16.32	2.49	1.13
1977–1981	2503	15.46	1.76	0.88	15.66	1.89	1.04
1982–1986	3067	9.75	1.96	1.01	9.88	2.11	1.20
1987–1991	2999	11.04	3.30	2.43	11.18	3.54	2.86
1992–1996	3915	13.05	4.75	3.58	13.29	5.24	4.41
1997–2001	4304	14.36	4.83	2.86	14.68	5.38	3.55
2002–2006	4415	16.51	5.53	3.31	16.88	6.21	4.17
2007–2011	4396	25.32	9.80	6.52	26.01	11.08	8.28
2012–2016	4020	38.96	17.61	…	39.99	20.17	…
1972–1986	8507	13.62	2.02	0.95	13.81	2.18	1.13
1987–2001	11,218	13.02	4.40	3.00	13.25	4.83	3.65
2002–2016	12,831	26.56	10.76	7.02	27.24	12.18	8.96
1972–2016	32,556	18.51	6.28	4.03	18.88	6.95	4.96