Table 1:
Characteristics of the Study Population Undergoing Ileal-Pouch Anal Anastomosis Creation
| Characteristic | Pouch creation at the time of colectomy (n = 1571) | Delayed Pouch (n = 819) | P |
|---|---|---|---|
| Median age (IQR), y | 40 (30–52) | 37 (27–50) | <0.01 |
| % female | 41 | 42 | 0.66 |
| % white | 87 | 85 | 0.23 |
| % BMI category | 0.48 | ||
| <18.5 | 4 | 4 | |
| 18.5–25 | 41 | 38 | |
| 26–30 | 34 | 37 | |
| >30 | 21 | 21 | |
| % current smoker | 6 | 7 | 0.18 |
| % diabetic | 6 | 5 | 0.32 |
| % chronic immunosuppressanta | 51 | 15 | <0.01 |
| Median preoperative albumin (IQR), g | 3.9 (3.5–4.2) | 4.2 (3.8–4.5) | <0.01 |
| Median preoperative white blood cell count (IQR), 10*9/Liter | 7.8 (6.1–10) | 7.0 (5.9–8.4) | <0.01 |
| Median preoperative hematocrit (IQR), % | 39 (35–42) | 40 (37–43) | <0.01 |
| % ASA class | 0.78 | ||
| 1 | 2 | 3 | |
| 2 | 69 | 67 | |
| 3 | 29 | 30 | |
| Median length of stay (IQR), d | 6 (4–9) | 5 (4–8) | <0.01 |
| Median operative time (IQR), min | 276 (212–353) | 213 (168–278) | <0.01 |
aChronic immunosuppressant includes steroids, and chronic is defined as >30 days before the procedure or at the time of evaluation for the procedure.
IQR = inter-quartile range.