Background factors influencing postgastrectomy syndromes after various types of gastrectomy

Table 4 Multiple regression analysis exploring independent factors affecting the Postgastrectomy Syndrome Assessment Scale scores for the cases of distal gastrectomy with Billroth I 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			0.064	0.0633							0.015	0.0224
Abdominal pain SS					0.1213	0.00043	-0.086	0.0175			0.0283	0.00023
Meal-related distress SS					0.1223	0.00033			-0.087	0.0111	0.0343	< 0.00013
Indigestion SS					0.067	0.0519			-0.096	0.0057	0.014	0.0305
Diarrhea SS			-0.1553	< 0.00013					-0.1303	0.00023	0.0423	< 0.00013
Constipation SS					0.068	0.0472					0.008	> 0.10
Dumping SS			-0.1413	< 0.00013	0.1413	< 0.00013	-0.066	0.0837	-0.067	0.0657	0.0563	< 0.00013
Total symptom score			-0.083	0.0258	0.1053	0.00473	-0.071	0.0677	-0.1023	0.00613	0.0373	< 0.00013
Change in BW									0.099	0.0049	0.016	0.02
Ingestion amount of food			-0.086	0.0125							0.009	> 0.10
Need of additional food	-0.1143	0.00123	0.074	0.030	0.102	0.00283	-0.1153	0.00143			0.0343	< 0.00013
Quality of ingestion SS			-0.07	0.0437							0.01	> 0.10
Ability for working			0.1773	< 0.00013	0.098	0.0046	-0.067	0.0632			0.0423	< 0.00013
Dissatisfaction: symptom					0.1283	0.00023					0.0233	0.00133
Dissatisfaction: meal	-0.077	0.0296			0.086	0.0125					0.017	0.0117
Dissatisfaction: working					0.095	0.0054	-0.071	0.0499			0.015	0.0193
Dissatisfaction SS					0.119	0.0005					0.019	0.0067
PCS of SF-8			-0.065	0.0591	-0.1233	0.00033	0.076	0.0355			0.0253	0.00053
MCS of SF-8					-0.1203	0.00053	0.1093	0.00263			0.0273	0.00033

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.