Background factors influencing postgastrectomy syndromes after various types of gastrectomy

Table 5 Multiple regression analysis exploring independent factors affecting the Postgastrectomy Syndrome Assessment Scale scores for distal gastrectomy with Roux-en-Y reconstruction

	Postop period		Age		Sex [female]		Approach [laparo]		Celiac branch [saved]
MOMs	β1	P	β	P	β	P	β	P	β	P	R22	P
Esophageal reflux SS					0.094	0.0439					0.017	> 0.10
Abdominal pain SS	-0.1033	0.02863			0.2263	< 0.00013					0.0663	< 0.00013
Meal-related distress SS			-0.085	0.0660	0.1973	< 0.00013					0.0533	0.00013
Indigestion SS	-0.091	0.0567			0.093	0.0456					0.0293	0.02003
Diarrhea SS											0.007	> 0.10
Constipation SS											0.015	> 0.10
Dumping SS			-0.094	0.0556	0.1963	< 0.00013					0.058	0.00023
Total symptom score					0.1363	0.00623					0.0313	0.02513
Change in BW			-0.1123	0.01993	-0.085	0.073					0.0263	0.03623
Ingestion amount of food											0.007	> 0.10
Need of additional food	-0.1133	0.01903			0.1323	0.00463					0.0323	0.01063
Quality of ingestion SS			-0.1653	0.00053			-0.082	0.0919			0.0313	0.01423
Ability for working	-0.1053	0.03033	0.1813	0.00013							0.0523	0.00033
Dissatisfaction: symptom	-0.1123	0.01963			0.1283	0.00593	-0.1003	0.03993			0.0323	0.01073
Dissatisfaction: meal	-0.1493	0.00203			0.078	0.0911					0.0283	0.02413
Dissatisfaction: working	-0.1183	0.01383			0.1053	0.02413					0.0253	0.03853
Dissatisfaction SS	-0.1483	0.00223			0.1273	0.00673					0.0363	0.00553
PCS of SF-8											0.013	> 0.10
MCS of SF-8	0.094	0.0506			-0.084	0.074					0.020	0.0977

¹β: standardized regression coefficient. If β is positive, then the score of the main outcome measures (MOMs) of the patient in the category in [brackets] is higher when the factor has a nominal scale, and the score of the MOMs of the patient with a larger value is higher when the factor has a numeric scale;

²R²: coefficient of determination;

³Significantly independent factors with a small effect size. Change in body weight, ingestion amount of food, quality of ingestion subscale, physical component summary, and mental component summary indicate higher scores (i.e., better conditions). Other outcome measures indicate higher scores (i.e., worse conditions). Interpretation of effect size: None or very small (β < 0.100, R² < 0.020); Small (β ≥ 0.100, R² ≥ 0.020); Medium (β ≥ 0.300, R² ≥ 0.130); Large (β ≥ 0.500, R² ≥ 0.260). MOMs: Main outcome measures; SS: Subscale; PCS: Physical component summary; MCS: Mental component summary; BW: Body weight; postop: Postoperative; laparo: Laparoscopic.