Table 3.
Pre- and Intra-operative characteristics (frequency and percentage, unless otherwise mentioned)
| Characteristic | Total (N=3802) | First surgery (N=3577) | Revision/reversal (N=225) | p value* | ||||
|---|---|---|---|---|---|---|---|---|
| Prior obesity/foregut surgery | 292 | 7.6 | 67 | 1.9 | 225 | 100 | <.001 | |
| missing, n | 1 | 1 | 0 | |||||
| Gastric bypass | 84 | 29.2 | 0 | 0 | 84 | 38 | ||
| Biliopancreatic diversion | 1 | 0.3 | 0 | 0 | 1 | 0.5 | ||
| Biliopancreatic diversion switch | 11 | 3.8 | 0 | 0 | 11 | 5 | ||
| Adjustable gastric band | 42 | 14.6 | 0 | 0 | 42 | 19 | ||
| Vertical banded gastroplasty | 47 | 16.3 | 0 | 0 | 47 | 21.3 | ||
| Sleeve gastrectomy | 4 | 1.4 | 0 | 0 | 4 | 1.8 | ||
| Prior foregut | 84 | 29.2 | 67 | 100 | 17 | 7.7 | ||
| Other previous obesity surgery | 49 | 17 | 0 | 0 | 49 | 22.2 | ||
| Surgery performed | <.001 | |||||||
| RYGB | 3557 | 93.6 | 3411 | 95.4 | 146 | 64.9 | ||
| Biliopancreatic diversion | 4 | 0.1 | 2 | 0.1 | 2 | 0.9 | ||
| Biliopancreatic diversion switch | 53 | 1.4 | 45 | 1.3 | 8 | 3.6 | ||
| Sleeve gastrectomy | 136 | 3.6 | 117 | 3.3 | 19 | 8.4 | ||
| Vertical banded gastroplasty | 1 | 0 | 1 | 0 | 0 | 0 | ||
| Other | 49 | 1.3 | 1 | 0 | 48 | 21.1 | ||
| Banded RYGB | 2 | 0.1 | 0 | 0 | 2 | 0.9 | ||
| Mins. incision - skin close, mean, median | 146.3, 137 | 143.9, 135 | 183.0, 180.5 | <.001 | ||||
| Missing, n | 7 | 6 | 1 | |||||
| Crystalloid fluids ml, mean, median | 2878.2, 2800 | 2845.1, 2700 | 3403, 3300 | <.001 | ||||
| missing, n | 42 | 40 | 2 | |||||
| Colloid fluids, ≥500 ml | 258 | 6.9 | 233 | 6.6 | 25 | 11.2 | 0.01 | |
| missing, n | 46 | 44 | 2 | |||||
| Blood loss ml, median (Q1, Q3)** | 0 (0,75) | 0 (0,60) | 100 (0,200) | <.001 | ||||
| missing, n | 39 | 38 | 1 | |||||
*
Chi-square test for categorical variables (with continuity correction for categorical data), Kruskal-Wallis test for continuous variables
**
Any blood loss of 50ml or less was treated as zero.