Table 2.
Three-year weight outcomes and mean change assessment
| Weight variable | Value | P valueb | ||
|---|---|---|---|---|
| Mean ± SD (95 % CI) | ||||
| N = 423a | ||||
| Preoperative | 3 Years | Mean change | ||
| Absolute weight, kg | 111.6 ± 16.9 (110.0, 113.2) | 87.1 ± 17.6 (85.4, 88.8) | −24.5 ± 14.6 (−25.9, −23.1) | <0.0001 |
| Excess body weight, kg | 52.5 ± 14.3 (51.1, 53.8) | 28.0 ± 15.8 (26.5, 29.5) | −24.5 ± 14.7 (−25.9, −23.1) | <0.0001 |
| BMI, kg/m2 | 41.2 ± 5.0 (40.7, 41.7) | 32.2 ± 5.8 (31.6, 32.7) | −9.0 ± 5.3 (−9.5, −8.5) | <0.0001 |
| % EWL | – | 47.4 ± 32.1 (44.3, 51.0) | – | – |
BMI body mass index, EWL excess weight loss, SD standard deviation, CI confidence interval
a N = 423 for absolute weight and BMI within-patient change calculations; N = 422 for excess weight within-patient change and %EWL calculations
b P values obtained from single-sample two-tailed t tests assessing mean weight change in patients with complete preoperative and 3-year follow-up data