Table 2.
The mean weight loss, mean body mass index, percentage of excess-weight loss and the patient follow-up rate at each time point
| Procedure; variable | Follow-up; mean (SD)* | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 3 mo | 6 mo | 1 yr | 2 yr | 3 yr | 4 yr | 5 yr | 6 yr | 7 yr | |
| Gastric bypass | |||||||||
| Weight loss, kg | 12.2 (6.7) | 25.7 (11.2) | 52.6 (19.6) | 60.2 (18.3) | 59.3 (25.2) | 56.3 (20.2) | 52.6 (19.8) | 49.6 (18.2) | 48.7 (16.3) |
| BMI, kg/m2 | 42.2 (8.5) | 36.8 (8.8) | 32.8 (7.8) | 30.4 (7.6) | 30.4 (6.8) | 30.3 (7.3) | 30.5 (8.5) | 29.6 (6.1) | 29.9 (8.0) |
| Excess-weight loss, % | 34.6 (14.6) | 54.8 (20.4) | 70.4 (22.5) | 78.8 (19.3) | 79.2 (22.1) | 78.9 (21.9) | 75.2 (24.5) | 78.8 (21.9) | 76.2 (28.4) |
| No. of patients examined | 886 | 712 | 653 | 315 | 153 | 55 | 40 | 35 | 10 |
| % of eligible patients followed up | 100 | 97 | 83 | 62 | 62 | 71 | 67 | 50 | 55 |
| Gastric band | |||||||||
| Weight loss, kg | 8.7 (5.3) | 13.9 (7.1) | 18.5 (10.5) | 24.5 (13.5) | 30.1 (12.2) | 34.6 (15.6) | 35.2 (10.5) | 18.4 (6.7) | — |
| BMI, kg/m2 | 40.4 (5.6) | 38.7 (5.4) | 36.2 (6.1) | 34.8 (6.3) | 32.7 (6.1) | 30.4 (7.1) | 31.1 (4.4) | 39.2 (2.1) | — |
| Excess-weight loss, % | 23.6 (14.6) | 31.4 (17.2) | 42.8 (23.4) | 49.6 (24.6) | 58.6 (24.0) | 60.0 (20.3) | 61 (23.1) | 26.6 (4.7) | — |
| No. patients examined | 149 | 132 | 112 | 63 | 38 | 12 | 10 | 2 | — |
| % of eligible patients followed up | 100 | 98 | 73 | 66 | 72 | 66 | 80 | 50 | — |
BMI = body mass index; SD = standard deviation.
*
Unless otherwise indicated.