Table 2:
Unmatched bivariate associations for patients with and without preoperative combined bowel preparation (N=1279)
| Preoperative Combined Bowel Prep | |||
|---|---|---|---|
| Characteristic | |||
| Yes (n=330) | No (n=949) | P value | |
| Age | |||
| Mean | 62.9 ± 13.8 | 60.0 ± 13.4 | <0.001 a |
| Gender | |||
| Male | 174 (52.7) | 511 (53.9) | 0.726b |
| Female | 156 (47.3) | 438 (46.1) | |
| Race | |||
| White | 188 (57.0) | 667 (70.3) | <0.001 b |
| Black | 124 (37.6) | 243 (25.6) | |
| Asian | 9 (2.7) | 28 (2.9) | |
| Other | 9 (2.7) | 11 (1.2) | |
| BMI | |||
| < 18.5 | 19 (5.8) | 44 (4.6) | <0.001 b |
| 18.5 – 24.9 | 98 (29.7) | 296 (31.2) | |
| 25 – 29.9 | 100 (30.3) | 271 (28.6) | |
| >30 | 105 (31.8) | 204 (21.5) | |
| Unknown | 8 (2.4) | 134 (14.1) | |
| Stage | |||
| Stage 1 | 86 (26.1) | 169 (17.8) | <0.001 b |
| Stage 2 | 106 (32.1) | 224 (23.6) | |
| Stage 3 | 95 (28.8) | 291 (30.7) | |
| Stage 4 | 43 (13.0) | 265 (27.9) | |
| Site | |||
| Colon | 254 (77.0) | 651 (68.6) | <0.01 b |
| Rectum | 76 (23.0) | 298 (31.4) | |
| Emergent Surgery | |||
| No | 328 (99.4) | 941 (99.2) | 0.674b |
| Yes | 2 (0.6) | 8 (0.8) | |
| Anastomotic Leak | |||
| No | 314 (95.2) | 899 (94.7) | 0.766b |
| Yes | 16 (4.8) | 50 (5.3) | |
| SSI | |||
| No | 283 (85.8) | 809 (85.2) | 0.821b |
| Yes | 47 (14.2) | 140 (14.8) | |
| Radiation | |||
| No | 281 (85.2) | 743 (78.3) | <0.01 b |
| Yes | 48 (14.8) | 206 (21.7) | |
| Chemotherapy | |||
| No | 235 (71.2) | 583 (61.4) | <0.002 b |
| Yes | 95 (28.8) | 366 (38.6) | |
| Blood Transfusion | |||
| No | 267 (80.9) | 870 (91.7) | <0.001 b |
| Yes | 63 (19.1) | 79 (8.3) | |
| Years of Follow Up | |||
| 1 year | 112 (33.9) | 161 (17.0) | <0.001 b |
| 2 years | 58 (17.6) | 166 (17.5) | |
| 3 years | 69 (20.9) | 144 (15.2) | |
| 4 years | 43 (13.0) | 104 (10.9) | |
| 5 years | 26 (7.9) | 96 (10.1) | |
| ≥6 years | 22 (6.7) | 279 (29.3) | |
SD = standard deviation
BMI = body mass index
SSI = surgical site infection
a
P value determined using Mann-Whitney U test
b
P values determined using Chi-square test