Table 6.

Results of analysis of prognostic factors for overall survival according to pStage.

Variables	pStage I, II						pStage III
	Univariate Analysis			Multivariate Analysis			Univariate Analysis			Multivariate Analysis
	HR	95% CI	p Value	HR	95% CI	p Value	HR	95% CI	p Value	HR	95% CI	p Value
Sex
Female	1			1			1			1
Male	1.731	1.419–2.111	<0.001	1.929	1.567–2.376	<0.001	1.236	0.998–1.532	0.053	1.252	1.006–1.558	0.044
Age (years)
<70	1			1			1			1
≥70	4.859	4.059–5.817	<0.001	4.159	3.444–5.024	<0.001	1.432	1.165–1.759	<0.001	1.206	0.963–1.509	0.103
Surgical procedure
Non-TG	1			1			1			1
TG	2.311	1.923–2.777	<0.001	1.722	1.415–2.095	<0.001	1.439	1.176–1.760	<0.001	1.376	1.119–1.692	0.002
Surgical approach
Laparoscopy	1			1			1			1
Open	2.298	1.937–2.726	<0.001	1.679	1.303–2.164	<0.001	1.446	0.876–2.388	0.149	1.963	1.117–3.452	0.019
Lymph node dissection
D1+	1			1			1			1
D2	1.526	1.284–1.812	<0.001	0.797	0.621–1.023	0.075	0.590	0.404–0.863	0.006	0.480	0.314–0.734	<0.001
Histological type
Differentiated	1			1			1			1
Undifferentiated	0.594	0.499–0.707	<0.001	0.957	0.780–1.147	0.631	0.972	0.783–1.205	0.794	1.140	0.913–1.423	0.249
Score (Prealbumin cutoff: 15)
0	1			1			1			1
1	2.086	1.737–2.506	<0.001	2.027	1.664–2.469	<0.001	1.258	1.010–1.565	0.040	1.212	0.957–1.534	0.110
2	3.000	2.269–3.967	<0.001	2.535	1.879–3.420	<0.001	0.981	0.720–1.335	0.902	0.962	0.692–1.337	0.817
Postoperative complication
Absent	1			1			1			1
Overall complications	1.480	1.212–1.808	<0.001				1.250	1.006–1.553	0.044
Severe complications	1.535	1.128–2.091	0.006	1.194	0.873–1.632	0.267	1.444	1.061–1.966	0.020	1.269	0.923–1.746	0.143
Adjuvant chemotherapy
Absent	1			1			1			1
Present	1.848	1.454–2.349	<0.001	1.706	1.313–2.217	<0.001	0.520	0.423–0.640	<0.001	0.564	0.453–0.701	<0.001