Table 2.
Univariate Cox Proportional Hazard Ratios for the Effect of Each Predictor on Time to Surgical Overnight Hospital Admission
| Predictors | Hazard Ratio (95% Confidence Interval) | p Value |
| Demographics | ||
| Race (African American vs Caucasian) | 0.633 (0.409–0.979) | .0398 |
| Age | 0.986 (0.954–1.019) | .4088 |
| Gender (female vs male) | 0.853 (0.558–1.306) | .4652 |
| Married (yes vs no) | 0.950 (0.621–1.454) | .8133 |
| Residence (rural vs urban) | 1.047 (0.684–1.602) | .8323 |
| Neuropsychological characteristics | ||
| MMSE | 1.121 (1.050–1.197) | .0007 |
| Depressive symptoms | 1.029 (0.942–1.125) | .5236 |
| Anxiety | 0.969 (0.922–1.018) | .2119 |
| MCS | 0.998 (0.976–1.020) | .8445 |
| Personal/family resources | ||
| Education | 1.065 (0.998–1.137) | .0588 |
| Private insurance (yes vs no) | 1.960 (1.256–3.058) | .0030 |
| Social support and social structure | ||
| Social support score | 0.963 (0.903–1.027) | .2561 |
| Perceived discrimination | 0.974 (0.788–1.205) | .8104 |
| Need | ||
| PCS | 0.981 (0.966–0.997) | .0228 |
| ADL limitations | 1.193 (1.030–1.382) | .0188 |
| SPPB composite score | 0.976 (0.914–1.041) | .4619 |
Notes: ADL = activities of daily living; MCS = the SF-12 mental component scale; MMSE = Mini-Mental State Examination; PCS = the SF-12 physical component scale; SPPB = Short Physical Performance Battery.