Table 2.
External Validation of Multivariate Prediction Model for 30-day Hospital Readmissions Among HIV-Infected Individuals
| Variable | aOR | 95% CI | p value |
|---|---|---|---|
| Clinical | |||
| History of AIDS defining illness | 0.87 | 0.58–1.32 | 0.52 |
| CD4 <92 (cells/μL) | 1.61 | 1.07–2.42 | 0.02 |
| Absolute lymphocyte count <=0.33 (x 109/L) | 0.93 | 0.61–1.44 | 0.75 |
| Creatinine ≤ 0.55 (mg/dL) | 1.02 | 0.39–2.68 | 0.96 |
| Creatinine > 1.77(mg/dL) | 2.35 | 1.28–4.34 | 0.006 |
| HCO3 ≤18 (mmol/L) | 0.95 | 0.51–1.78 | 0.86 |
| AST or ALT >35 (U/L) | 1.34 | 0.91–1.98 | 0.14 |
| HCT ≤ 28.3 or >48.8 (%) | 0.85 | 0.53–1.41 | 0.53 |
| PO2 (57–113) (mmHg) | 1.07 | 0.23–5.01 | 0.94 |
| Anion gap >12 or missing (mmol/L) | 0.56 | 0.33–0.96 | 0.04 |
| Nonclinical | |||
| Medicaid insurance | 1.44 | 0.97–2.15 | 0.07 |
| Lives >13 miles from hospital | 0.77 | 0.33–1.41 | 0.23 |
| Number prior inpatient admits in past 6 mo | 1.99 | 1.47–2.71 | <0.001 |
| Number prior ED visits in past 12 mo | 2.08 | 1.30–3.30 | 0.002 |
| Homeless | 0.79 | 0.46–1.36 | 0.40 |
C statistic=0.646
AIDS= acquired immune deficiency syndrome; HC03= Bicarbonate; AST= aspartate aminotransferase; ALT= alanine aminotransferase; HCT= hematocrit; P02= partial pressure of Oxygen; ED= emergency department