Comparison of effects of six main gastrectomy procedures on patients’ quality of life assessed by Postgastrectomy Syndrome Assessment Scale-45

Table 1 Structure of Postgastrectomy Syndrome Assessment Scale-45

Domains	Subdomains		Items		Subscales
QOL	SF-8 (QOL)	1	Physical functioning	Five or six-point Likert scale	Physical component summary (item 1-8)
		2	Role physical		Mental component summary (item 1-8)
		3	Bodily pain
		4	General health
		5	Vitality
		6	Social functioning
		7	Role emotional
		8	Mental health
Symptoms	GSRS (Symptoms)	9	Abdominal pains	Seven-point Likert scale	Esophageal reflux subscale (item 10, 11, 13, 24)
		10	Heartburn	Except item 29 and 32	Abdominal pain subscale (item 9, 12, 28)
		11	Acid regurgitation		Meal-related distress subscale (item 25-27)
		12	Sucking sensations in the epigastrium		Indigestion subscale (item 14-17)
		13	Nausea and vomiting		Diarrhea subscale (item 19, 20, 22)
		14	Borborygmus		Constipation subscale (item 18, 21, 23)
		15	Abdominal distension		Dumping subscale (item 30, 31, 33)
		16	nausea and vomiting
		17	Increased flatus		Total symptom scale (above seven subscales)
		18	Decreased passage of stools
		19	Increased passage of stools
		20	Loose stools
		21	Hard stools
		22	Urgent need for defecation
		23	Feeling of incomplete evacuation
	PGSAS (Symptoms)	24	Bile regurgitation
		25	Sense of foods sticking
		26	Postprandial fullness
		27	Early satiation
		28	Lower abdominal pains
		29	Number and type of early dumping symptoms
		30	Early dumping general symptoms
		31	Early dumping abdominal symptoms
		32	Number and type of late dumping symptoms
		33	Late dumping symptoms
Living status	Meals (amount) 1	34	Ingested amount of food per meal		-
		35	Ingested amount of food per day
		36	Frequency of main meals
		37	Frequency of additional meals
	Meals (quality)	38	Appetite	five-point Likert scale	Quality of ingestion subscale (item 38-40)
		39	Hunger feeling
		40	Satiety feeling
	Meals (amount) 2	41	Necessity for additional meals		-
	Social activity	42	Ability for working		-
QOL	Dissatisfaction (QOL)	43	Dissatisfaction with symptoms		Dissatisfaction for daily life subscale (item 43-45)
		44	Dissatisfaction at the meal
		45	Dissatisfaction at working

In italicized items or subscales, higher score indicates better condition; In non-italicized items or subscales, higher score indicates worse condition. Each subscale is calculated as the mean of composed items or subscales except physical component summary and mental component summary of 8-item short-form generic health-related quality of life questionnaire. Item 29 and 32 don't have score. Then, they were analyzed separately. GSRS: Gastrointestinal Symptom Rating Scale items; PGSAS: Postgastrectomy Syndrome Assessment Scale items; QOL: Quality of life; SF-8: 8-item short-form generic health-related QOL questionnaire.