Predictive factors for body weight loss and its impact on quality of life following gastrectomy

Table 5 Impact of postoperative lower body mass index and body weight loss on the quality of life (multiple regression analysis)

Variables	Ability for working		Dissatisfaction with symptoms		Dissatisfaction at the meals		Dissatisfaction at working		Dissatisfaction for daily life subscale		PCS		MCS
	β	P value	β	P value	β	P value	β	P value	β	P value	β	P value	β	P value
Postoperative BMI (kg/m2)	-0.134	< 0.0001	-0.189	< 0.0001	0.216	< 0.0001	-0.185	< 0.0001	-0.231	< 0.0001	0.148	< 0.0001	0.109	< 0.0001
Change in body weight (%)	(-0.081)	0.0018	(-0.073)	0.0040	-0.112	< 0.001	(-0.097)	<0.0001	-0.109	< 0.0001	(0.047)	0.066	(0.025)	NS
R2 (P value)	0.031	< 0.0001	0.048	< 0.0001	0.073	< 0.001	0.054	< 0.0001	0.080	< 0.0001	0.028	< 0.0001	(0.014)	< 0.0001

BMI: Body mass index; QOL: Quality of life; PCS: Physical component summary; MCS: Mental component summary.