Table 2.
Comparisons of the BMI readings and change during the follow-up period between PRYGB and RRYGB
| PRYGB n = 504 |
RRYGB n = 150 |
Adjusted mean difference | P-value | ||||
|---|---|---|---|---|---|---|---|
| M | (SE) | M | (SE) | Est | (95% CI) | ||
| BMI | |||||||
| Pre-operative | 47.7 | (0.30) | 47.7 | (0.59) | − 0.02 | (− 1.3, 1.3) | (.977) |
| Post-operative | |||||||
| 1st 6 m | 30.5 | (0.99) | 35.2 | (1.21) | 4.65 | (3.6, 5.7) | (< .001) |
| 2nd 6 m | 26.1 | (1.13) | 27.9 | (1.30) | 1.84 | (1, 2.7) | (< .001) |
| 2nd year | 24.4 | (1.05) | 26.1 | (1.16) | 1.69 | (0.9, 2.5) | (< .001) |
| 3rd year | 25.2 | (1.16) | 27.1 | (1.29) | 1.88 | (1.1, 2.6) | (< .001) |
| 4th year | 26.5 | (0.97) | 28.2 | (1.12) | 1.70 | (0.8, 2.6) | (< .001) |
| 5th year | 26.1 | (0.94) | 28.9 | (1.11) | 2.76 | (1.8, 3.8) | (< .001) |
| Change in BMI | |||||||
| 1st 6 m | − 16.3 | (1.55) | − 11.6 | (1.69) | 4.76 | (3.8, 5.7) | (< .001) |
| 2nd 6 m | − 4.4 | (1.44) | − 7.2 | (1.62) | − 2.81 | (− 3.8, − 1.8) | (< .001) |
| 2nd year | − 1.7 | (1.29) | − 1.9 | (1.37) | − 0.17 | (− 0.8, 0.5) | (.605) |
| 3rd year | 0.8 | (1.37) | 1 | (1.43) | 0.19 | (− 0.4, 0.8) | (.509) |
| 4th year | 1.3 | (1.13) | 1.2 | (1.23) | − 0.18 | (− 0.8, 0.4) | (.542) |
| 5th year | − 0.5 | (0.22) | 0.6 | (0.26) | 1.07 | (0.8, 1.4) | (< .001) |
Adjusted for age and sex using multiple linear regression estimated using the generalized estimation equation and weighted by inverse propensity score weights where primary RYGB is the reference group; PRYGB, primary Roux-en-Y gastric bypass; RRYGB, revisional Roux-en-Y gastric bypass; BMI, body mass index; M, mean; SE, standard error; Est., estimated value