Table 3. Survival results in different subgroups.

Category	Median survival time (months)						P value
	0	1–10	11–20	21–30	>30	Total
Age (years old)
<50	47	39	49	95	20	43	<0.001
≥50	35	31	38	46	40	36	<0.001
Sex
Male	32	31	39	49	38	36	<0.001
Female	82	47	51	76	28	50	0.373
Grade
Grade I	81	73	83	NA	174	84	0.07
Grade II	32	38	49	75	45	44	<0.001
Grade III	24	21	26	29	29	24	0.01
T stage
T1	88	102	154	NA	NA	120	0.006
T2	43	36	55	124	120	51	0.001
T3	26	23	28	29	29	26	0.007
T4	30	23	28	27	18	25	0.110
Tumor size, cm
0.1–1.0	NA	101	NA	NA	NA	NA	0.279
1.1–2.0	52	55	70	124	91	65	0.532
2.1–3.0	48	32	32	59	52	36	0.177
3.1–4.0	22	25	37	33	46	30	0.002
>4.0	39	24	30	33	28	29	0.003

NA, not available.