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

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

  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%)
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)
  1. 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
  2. *Significantly different compared to patients who responded to the online survey at the p < 0.05 level