Research Article
A Simpler Method for Predicting Weight Loss in the First Year after Roux-en-Y Gastric Bypass
| | Time after operation | 0 months | 3 months | 6 months | 9 months | 12 months |
| | Number of patients | 1551 | 534 | 344 | 248 | 224 | | % patients on given month | 100% | 34.4% | 22.2% | 16.0% | 14.4% | | Tallest versus shortest quartile | 100%
versus 100% | 79.7%
versus 81.0%* | 70.7%
versus 71.7% | 64.4%
versus 67.5%* | 61.0%
versus 62.6%* | | Youngest versus oldest quartile | 100%
versus 100% | 79.4%
versus 81.0%* | 69.1%
versus 72.2%* | 63.9%
versus 66.4%* | 58.0%
versus 64.3%* | | Number of males/females | 219/1332 | 76/458 | 57/287 | 35/213 | 33/191 | | Males versus females % IW | 100%
versus 100% | 79.6%
versus 80.5% | 70.5%
versus 71.3% | 64.0%
versus 65.7% | 60.4%
versus 62.2% | | Number of White/Hisp./Black | 940/200/137 | 299/82/30 | 185/36/22 | 126/25/15 | 117/20/14 | | W versus H versus B | 100% (all) | 82 versus 81
versus 81% | 72 versus 72
versus 75%* | 67 versus 66
versus 71% | 64 versus 61
versus 64% | | Number of LAPGB/OGB | 314/1237 | 135/399 | 120/224 | 78/170 | 90/134 | | LAPGB versus OGB | 100%
versus 100% | 78.4%
versus 81.1%* | 68.6%
versus 72.6%* | 62.0%
versus 67.0%* | 59.0%
versus 63.9%* | | Percent IW postoperation | 100% | 80.4% | 71.2% | 65.5% | 61.9% | | Standard deviation % IW | 0% | 3.9% | 5.8% | 6.6% | 7.5% |
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*statistically significant at a 95% confidence level
W: Whites; H: Hispanics; B: Blacks
LAPGB: laparoscopic gastric bypass
OGB: open gastric bypass
IW: initial weight.
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