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

Table 2 Structure of postgastrectomy syndrome assessment scale-45 (domains/subdomains/items/subscales)

Domains	Subdomains		Items	Subscales
QOL	SF-8 (QOL)	1	Physical functioning1	Physical component summary1 (item 1-8)
		2	Role physical1	Mental component summary1 (item 1-8)
		3	Bodily pain1
		4	General health1
		5	Vitality1
		6	Social functioning1
		7	Role emotional1
		8	Mental health1
Symptoms	GSRS (Symptoms)	9	Abdominal pains	Esophageal reflux subscale (item 10, 11, 13, 24)
		10	Heartburn	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
	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 meal1
		35	Ingested amount of food per day1
		36	Frequency of main meals
		37	Frequency of additional meals
	Meals (quality)	38	Appetite1	Quality of ingestion subscale1 (item 38-40)
		39	Hunger feeling1
		40	Satiety feeling1
	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 meals
		45	Dissatisfaction at working

¹Higher scores indicate better conditions. Each subscales is calculated as the mean of its composite items or subscales, except the physical and mental component summaries of SF-8. Items 29 and 32 do not have scores; these were analyzed separately. PGSAS-45: Postgastrectomy syndrome assessment scale-45; SF-8: Short form-8; QOL: Quality of life; GSRS: Gastrointestinal symptom rating scale.