Table 2.

Odds ratios of the prediabetes and diabetes group for risk of postoperative weight gain compared with the NGT group.

Variables	Univariate model		Multivariate model
	OR [95% CI]	P	OR [95% CI]	P
Glycemic status
NGT	1.00	–	1.00	–
Prediabetes	1.03 [0.33–3.20]	0.955	1.18 [0.36–3.88]	0.787
Diabetes mellitus	5.17 [1.54–17.32]	0.008	7.65 [1.81–32.39]	0.006
HbA1c (per 1%)	1.70 [1.12–2.59]	0.013	1.64 [1.08–2.50]	0.021

Logistic regression analysis was performed to analyze the degree to which glycemic status predicts postoperative weight gain. Results were expressed as odds ratios and 95% confidence intervals. In the univariate model, both prediabetes and diabetes significantly predicted postoperative weight gain, and the significance was maintained even after adjusting for age, IGF1 (xULN) and postoperative CDI status. And for each 1% HbA1c increment, the risk of postoperative weight gain increased by 1.7 times.

CDI, central diabetes mellitus; CI, confidence interval; IGF1, insulin-like growth factor 1; NGT, normal glucose tolerance; OR, odds ratio; ULN, upper limit of normal.