Table 5.

Multiple linear regression analysis of factors influencing EORTC QLQ-C30 summary score.

	B	SE	t	P	95%CI	VIF
Constant	67.144	0.834	80.525	<0.001	65.507 to 68.781
Follow- up duration (≤6 as reference)
7-24	19.751	0.966	20.443	<0.001	17.855 to 21.648	1.776
25-60	20.850	1.092	19.087	<0.001	18.706 to 22.994	1.724
>60	20.324	1.832	11.092	<0.001	16.728 to 23.921	1.187
Drinking (none as reference)	4.592	2.255	2.037	0.042	0.167 to 9.018	1.007
Recurrence reoperation (none as reference)	-8.908	2.539	-3.509	<0.001	-13.891 to -3.925	1.005
Postoperative complaints (none as reference)
1	-5.747	1.588	-3.618	0.001	-8.864 to -2.629	1.012
≥2	-15.345	2.614	-5.871	<0.001	-20.475 to -10.215	1.007