Table 1.

Patient characteristics and univariate analysis of prognostic factors.

Variables	Number of patients (%)	Median survival (m)	3-years survival rate (%)	P
Age (years)				0.337
<60	108 (28.7%)	32.0	46.5%
≥60	268 (71.3%)	27.8	40.5%
Sex				0.186
Male	296 (78.7%)	28.0	40.1%
Female	80 (21.3%)	32.6	50.3%
Primary tumor location				<0.001
Upper	179 (47.6%)	41.5	55.7%
Middle	136 (36.2%)	26.0	35.1%
Lower	61 (16.2%)	16.0	21.3%
T category				<0.001
T2	78 (20.7%)	49.0	55.0%
T3	230 (61.2%)	28.0	42.4%
T4	68 (18.1%)	17.5	22.8%
No. of LNs				<0.001
0	96 (25.5%)	46.0	53.2%
1–2	160 (44.4%)	36.0	49.1%
3–6	103 (27.4%)	18.0	26.8%
≥7	17 (4.5%)	13.0	0
Size of LNs				<0.001
0	96 (25.5%)	46.0	53.2%
>0.5 to ≤1 cm	137 (36.4%)	32.0	46.2%
>1 to ≤2 cm	96 (25.5%)	24.8	35.5%
>2 cm	47 (12.5%)	17.0	22.7%
Treatment				0.013
CRT	236 (62.8%)	33.0	47.0%
RT alone	140 (37.2%)	25.6	34.2%

LNs, lymph nodes; CRT, chemoradiotherapy; RT, chemoradiotherapy.