Table 1.
Patient characteristics and preoperative risk factors for readmission
| Risk factors | Total | No. of patients readmitted (%) |
No. of patients not readmitted (%) |
P value |
|---|---|---|---|---|
| No. of patients | 3,556 | 320 (9) | 3,236 (91) | |
| Sex (Male) | ||||
| Yes | 1,925 | 164 (9) | 1,761 (91) | |
| No | 1,631 | 151 (9) | 1,480 (91) | .238 |
| Race (White) | ||||
| Yes | 3,198 | 282 (9) | 2,907 (91) | |
| No | 335 | 31 (9) | 304 (91) | .432 |
| Functional status | ||||
| Independent | 3,243 | 292 (9) | 2,951 (91) | |
| Partially dependent | 230 | 30 (13) | 200 (87) | |
| Totally dependent | 83 | 3 (4) | 80 (96) | .021 |
| ASA class | ||||
| 1 | 260 | 10 (4) | 250 (96) | |
| 2 | 1,920 | 157 (8) | 1,763 (92) | |
| 3 | 1,217 | 129 (11) | 1,088 (89) | |
| 4 | 153 | 18 (12) | 135 (88) | <.001 |
| BMI ≥ 30 | ||||
| Yes | 1,381 | 119 (9) | 1,262 (91) | |
| No | 2,175 | 196 (9) | 1,979 (91) | .367 |
| Smoker | ||||
| Yes | 635 | 59 (9) | 576 (91) | |
| No | 2,921 | 256 (9) | 2,665 (91) | .360 |
| Dyspnea | ||||
| Yes | 283 | 19 (7) | 264 (93) | |
| No | 3,273 | 296 (9) | 2,977 (91) | .110 |
| COPD | ||||
| Yes | 147 | 16 (11) | 131 (89) | |
| No | 3,409 | 299 (9) | 3,110 (91) | .226 |
| Ascites | ||||
| Yes | 64 | 6 (9) | 58 (91) | |
| No | 3,492 | 309 (9) | 3,183 (91) | .506 |
| CHF | ||||
| Yes | 38 | 1 (3) | 37 (97) | |
| No | 3,518 | 314 (9) | 3,204 (91) | |
| Hypertension | ||||
| Yes | 1,538 | 138 (9) | 1,400 (91) | |
| No | 2,018 | 177 (9) | 1,841 (91) | .440 |
| Acute renal failure | ||||
| Yes | 14 | 0 (0) | 14 (100) | |
| No | 3,543 | 315 (9) | 3,227 (91) | .272 |
| Dialysis | ||||
| Yes | 36 | 5 (14) | 31 (86) | |
| No | 3,520 | 310 (9) | 3,210 (91) | .210 |
| Cancer | ||||
| Yes | 166 | 16 (10) | 150 (90) | |
| No | 3,390 | 299 (9) | 3,091 (91) | .399 |
| Open wound | ||||
| Yes | 203 | 22 (11) | 181 (89) | |
| No | 3,353 | 293 (9) | 3,060 (91) | .184 |
| Steroid use | ||||
| Yes | 274 | 47 (17) | 227 (83) | |
| No | 3,282 | 268 (8) | 3,014 (92) | <.001 |
| Weight loss | ||||
| Yes | 186 | 24 (13) | 162 (87) | |
| No | 3,370 | 291 (9) | 3,079 (91) | .036 |
| Bleeding | ||||
| Yes | 224 | 32 (14) | 192 (86) | |
| No | 3,332 | 283 (8) | 3,049 (92) | .004 |
| Transfusion | ||||
| Yes | 39 | 5 (13) | 34 (87) | |
| No | 3,517 | 310 (9) | 3,207 (91) | .260 |
| Sepsis | ||||
| Yes | 565 | 52 (9) | 513 (91) | |
| No | 2,991 | 263 (9) | 2,728 (91) | .402 |
| Comorbidities ≥2 | ||||
| Yes | 2,785 | 260 (9) | 2,525 (91) | |
| No | 771 | 55 (7) | 716 (93) | .031 |
| Diabetes | ||||
| Yes | 538 | 46 (9) | 492 (91) | |
| No | 3,018 | 269 (9) | 2,749 (91) | .792 |
| Age | ||||
| <30 | 366 | 44 (12) | 322 (88) | |
| 30–49 | 974 | 81 (8) | 893 (92) | |
| 50–69 | 1,526 | 138 (9) | 1,388 (91) | |
| 70–89 | 671 | 50 (7) | 621 (93) | |
| ≥90 | 19 | 2 (11) | 17 (89) | .155 |
ASA = American Society of Anesthesiologists; BMI = body mass index; CHF = congestive heart failure; COPD = chronic obstructive pulmonary disease.