Table 2

Results from adjusted analysis of prognostic variables

Variables	Estimated coefficient	Estimated SE	Estimated HR	95% CI of HR	P value
Age	−0.119	0.038	0.888	0.825 to 0.956	0.0016*
Age square	0.001	0.0003	1.001	1.000 to 1.002	0.0005*
No of cancer nodules	0.103	0.040	1.108	1.024 to 1.199	0.0106*
Lymph node metastasis rate group					<0.0001*
0 (reference)	–	–	1.000	–
≤0.35	−0.033	0.152	1.033	0.768 to 1.390
0.35–0.74	0.577	0.153	1.780	1.320 to 2.401
≥0.74	0.825	0.169	2.491	1.774 to 3.497
Invasion depth group					0.0041*
Submucosa	–	–	1.000	(– to –)
Mucosa	−0.880	0.776	0.415	0.091 to 1.898
Muscular	0.256	0.370	1.291	0.625 to 2.669
All layer	0.740	0.334	2.095	1.089 to 4.032
Surgical type II group					<0.0001*
Radical	–	–
Palliative	1.757	0.364
Tumour size					0.0010*
≤4 cm (reference)	–	–
4–8 cm	0.240	0.132
≥8 cm	0.566	0.152
Surgical type II group* tumour size					0.0003*
Palliative versus radical ≤4 cm (reference)	–	–
Palliative 4–8 cm	−1.026	0.453
Palliative ≥8 cm	−2.097	0.517