Factors affecting the quality of life of patients after gastrectomy as assessed using the newly developed PGSAS-45 scale: A nationwide multi-institutional study

Table 3 Comparison of patients' characteristics, living status and quality of life between total and distal gastrectomy

		TG (n = 393)		DG (n = 1384)		P value	Cohen's d
		mean	SD	mean	SD
Patients'	Age (yr)	63.4	9.2	61.8	9.1	0.00192	(0.18)
characteristics	Sex (male: n/%)	276/71.0%		912/66.2%		0.07983	-
	Postoperative period (mo)	35.0	24.6	37.9	27.4	0.09182	(0.10)
Symptoms	Total symptom score	2.2	0.7	1.9	0.7	< 0.00012	0.35
Living status	Change in body weight (%)1	-13.8%	7.9%	-8.3%	7.6%	< 0.00012	0.71
	Necessity for additional meals	2.4	0.8	1.9	0.8	< 0.00012	0.61
	Ability for working	2.0	0.9	1.8	0.9	< 0.00012	0.31
QOL	Dissatisfaction for daily life SS	2.3	0.9	1.9	0.8	< 0.00012	0.53
	Physical component summary1	49.6	5.6	50.6	5.6	0.00202	(0.18)
	Mental component summary1	49.2	6.0	49.9	5.7	0.04262	(0.12)
The interpretation of effect size		Cohen's d
None-very small		< (0.2)
Small		≥ 0.2
Medium		≥ 0.5
Large		≥ 0.8

Outcome measures with¹, higher score indicating better condition; Outcome measures without¹, higher score indicating worse condition.

²t-test;

³χ² test. TG: Total gastrectomy; DG: Distal gastrectomy; QOL: Quality of life.