Definitions of Long-Term Weight Regain and Their Associations with Clinical Outcomes

Table 2 Patient characteristics for the total sample and for patients selected from the database and patients who responded to the online survey

	Mean (SD) unless otherwise stated
	Total, N = 868	Patients selected from the database, N = 714	Patients who responded to the online survey, N = 154
Age, in years	46.1 (10.6)	46.6 (10.4)*	44.1 (11.1)
Female gender, n (%)	684 (79%)	547 (77%)*	137 (89%)
Type of surgery, n (%)	788 RYGB (91%)	502 RYGB (91%)	139 RYGB (90%)
Type of surgery, n (%)	80 SG (9%)	53 SG (9%)	15 SG (10%)
BMI at baseline, kg/m²	44.8 (5.9)	45.0 (6.0)	44.1 (5.6)
BMI nadir	30.2 (5.4)	30.3 (5.4)	29.9 (5.1)
BMI 5-year FU	33.2 (6.2)	33.3 (6.2)	32.7 (6.1)
%TWL 5-year FU	25.8 (10.3)	25.8 (10.4)	25.8 (10.3)
Baseline T2DM, n (%)	252 (29%)	222 (31%)*	30 (20%)
Baseline hypertension, n (%)	382 (44%)	323 (45%)	59 (38%)
Baseline dyslipidemia, n (%)	210 (24%)	189 (27%)*	21 (14%)
Baseline OSA, n (%)	130 (15%)	114 (16%)	16 (10%)
Baseline arthroses, n (%)	136 (16%)	108 (15%)	28 (18%)
5-year FU T2DM, n (%)	104 (14%)	89 (15%)	15 (10%)
5-year FU hypertension, n (%)	204 (28%)	176 (30%)*	28 (18%)
5-year FU dyslipidemia, n (%)	117 (16%)	106 (18%)*	11 (7%)
5-year FU OSA, n (%)	72 (9%)	63 (11%)	9 (6%)
5-year FU arthroses, n (%)	188 (21%)	134 (19%)*	54 (35%)
Baseline RAND-36 score PHS	51.5 (22.2)	50.5 (22.7)	54.9 (20.2)
Baseline RAND-36 score MHS	66.0 (18.4)	65.3 (18.7)	68.3 (17.1)
5-year FU RAND-36 score PHS	66.8 (23.8)	69.0 (24.5)*	57.1 (17.6)
5-year FU RAND-36 score MHS	70.2 (22.7)	69.2 (23.2)*	74.6 (20.0)

BMI body mass index, %TWL percentage total weight loss, T2DM type 2 diabetes mellitus, nadir lowest weight measured after surgery, OSA obstructive sleep apnea, FU follow-up
*Significantly different compared to patients who responded to the online survey at the p < 0.05 level