Table 6.
Impact of variables on unplanned readmission. Variables were included in univariate analysis if significant in Table 1, Table 2, Table 3 and Table 4 and N > 9. Variables were included in the multivariate model if p < 0.2 for univariate analysis.
| Variable | Univariate | Multivariate | ||||
|---|---|---|---|---|---|---|
| OR (CI) | p-Value | aOR (CI) Unsaturated |
p-Value | aOR (CI) Saturated |
p-Value | |
| Malnourished | 1.79 (1.34–2.40) | <0.001 * | 1.51 (1.11–2.05) | 0.009 * | 1.42 (1.04–1.95) | 0.028 * |
| Age | 0.99 (0.98–1.00) | 0.119 | 0.99 (0.98–1.00) | 0.024 * | 0.99 (0.98–1.00) | 0.033 * |
| Female | 0.85 (0.64–1.12) | 0.251 | 1.00 (0.74–1.35) | 0.988 | 1.02 (0.75–1.39) | 0.886 |
| Race | ||||||
| NHW | 1.14 (0.81–1.61) | 0.458 | - | - | - | - |
| NHB | 1.00 (0.65–1.56) | 0.987 | - | - | - | - |
| Hispanic | 0.77 (0.42–1.41) | 0.406 | - | - | - | - |
| Asian | 0.84 (0.41–1.73) | 0.638 | - | - | - | - |
| AIAN | 2.65 (0.24–29.31) | 0.428 | - | - | - | - |
| NHOPI | - | - | - | - | - | - |
| BMI | 0.99 (0.97–1.01) | 0.246 | - | - | - | - |
| ASA (1–2) | 0.55 (0.34–0.89) | 0.015 * | REF | REF | REF | REF |
| ASA (3–4) | 1.82 (1.12–2.94) | 0.015 * | 1.63 (0.99–2.67) | 0.053 | 1.59 (0.97–2.62) | 0.067 |
| Electrolyte abnormality | 1.22 (0.86–1.72) | 0.263 | - | - | 1.11 (0.77–1.60) | 0.581 |
| Emergency case | 0.84 (0.58–1.23) | 0.374 | - | - | - | - |
| Smoking | 0.91 (0.64–1.29) | 0.584 | - | - | - | - |
| Dyspnea | 1.45 (0.89–2.37) | 0.133 | 1.27 (0.76–2.10) | 0.359 | 1.17 (0.69–1.97) | 0.557 |
| Dependent functional status | 0.94 (0.59–1.49) | 0.780 | - | - | - | - |
| Bleeding disorder | 2.12 (1.31–3.41) | 0.002 * | 1.89 (1.16–3.10) | 0.011 * | 1.90 (1.15–3.14) | 0.012 * |
| Anemic | 1.97 (1.44–2.70) | <0.001 * | 1.78 (1.27–2.49) | 0.001 * | 1.74 (1.24–2.45) | 0.001 * |
| RBC transfusion day of surgery |
1.02 (0.74–1.40) | 0.907 | 0.83 (0.60–1.16) | 0.274 | 0.75 (0.54–1.05) | 0.099 |
| Wound dehiscence | 4.95 (1.50–16.34) | 0.009 * | - | - | 3.31 (0.86–12.82) | 0.083 |
| DVT | 3.98 (2.43–6.53) | <0.001 * | - | - | 3.80 (2.28–6.34) | <0.001 * |
| Systemic sepsis | 3.32 (1.57–7.02) | 0.002 * | - | - | 2.47 (1.13–5.42) | 0.024 * |
| Non-routine discharge | 1.16 (0.88–1.53) | 0.290 | - | - | - | - |
OR: odds ratio; CI: 95% confidence interval; aOR: adjusted odds ratio; NHW: non-Hispanic white; NHB: non-Hispanic black; AIAN: American Indian or Alaska native; NHOPI: native Hawaiian or Pacific islander; BMI: body mass index; ASA: American Society of Anesthesiologists classification; RBC: red blood cell; DVT: deep vein thrombosis. * statistically significant.