TABLE 3.
Characteristics of severe sepsis hospitalizations with and without an unplanned 30-day readmission.
| Characteristic | No Unplanned 30-day Readmission |
Unplanned 30-day Readmission |
Multivariable OR (95% CI) (Readmission vs. No Readmission) |
|---|---|---|---|
| % | % | ||
| N = 170,274 | N = 42,400 | ||
| Age (years) (mean, SD) (24 Missing) | 64.9 (17.5) | 64.2 (17.1) | 0.99 (0.99–1.00) |
| Sex (3 Missing) | |||
| Female | 48.9 | 49.4 | 1.03 (1.01–1.05) |
| Male | 51.1 | 50.6 | Ref |
| Race (1,936 Missing) | |||
| White | 65.7 | 65.3 | Ref |
| Black/African American | 23.7 | 24.5 | 1.00 (0.97–1.03) |
| Other | 10.6 | 10.2 | 0.96 (0.92–1.00) |
| Pay Type | |||
| Medicare | 64.7 | 66.5 | Ref |
| Medicaid | 14.2 | 16.6 | 1.03 (0.99–1.07) |
| Private | 13.9 | 12.2 | 0.78 (0.75–0.81) |
| Self-Pay | 4.7 | 3.0 | 0.64 (0.60–0.68) |
| Other | 2.6 | 1.8 | 0.69 (0.64–0.76) |
| APR-DRG SOI (12 Missing) | |||
| Minor | 0.4 | 0.2 | Ref |
| Moderate | 6.5 | 3.4 | 1.03 (0.79–1.33) |
| Major | 52.9 | 36.5 | 1.45 (1.13–1.87) |
| Extreme | 40.3 | 49.9 | 1.85 (1.43–2.38) |
| Index Admission LOS (days) (1,646 Missing) | |||
| ≤ 2 | 15.4 | 11.0 | Ref |
| 3–6 | 44.8 | 41.0 | 1.19 (1.15–1.24) |
| ≥ 7 | 39.9 | 48.0 | 1.42 (1.36–1.47) |
| Weighted Charlson Comorbidity Score | |||
| 0 | 16.4 | 10.1 | Ref |
| 1 | 19.5 | 15.0 | 1.24 (1.19–1.29) |
| ≥ 2 | 64.1 | 74.9 | 1.70 (1.64–1.76) |
| Admitted to ICU (at any time during hospitalization) |
29.0 | 31.3 | 0.90 (0.87–0.92) |
| ICD-9 Infection Category | |||
| Infectious and Parasitic Diseases | 47.6 | 49.1 | 0.98 (0.96–1.01) |
| Respiratory System | 34.2 | 32.5 | 0.91 (0.88–0.94) |
| Digestive System | 10.6 | 15.4 | 1.35 (1.30–1.40) |
| Genitourinary | 39.7 | 37.6 | 0.99 (0.96–1.01) |
| Skin and Subcutaneous Tissue | 10.6 | 9.9 | 0.90 (0.87–0.94) |
| Other | 12.8 | 14.6 | 1.05 (1.02–1.09) |
| ICD-9 Organ Dysfunction Category | |||
| Cardiovascular | 21.3 | 21.4 | 0.99 (0.96–1.02) |
| Hematological | 16.3 | 17.9 | 1.00 (0.97–1.04) |
| Neurologic | 11.2 | 10.8 | 0.96 (0.92–0.99) |
| Renal | 53.3 | 53.9 | 0.94 (0.91–0.97) |
| Respiratory | 23.9 | 24.7 | 1.03 (1.00–1.06) |
| Hepatic | 1.0 | 1.1 | 0.92 (0.83–1.02) |
Legend: Characteristics refer to index hospitalization. Odds ratios were determined using a multivariable mixed effects regression model with hospital identifiers included as random intercepts. Complete data for 212,674 eligible discharges, representing 209 hospitals. Four hospitals with fewer than 25 eligible cases, totaling 64 discharges, were excluded. OR = odds ratio; CI = confidence interval; SD = standard deviation; APR-DRG = all patients-refined diagnosis-related group; SOI = severity of illness; ICU = intensive care unit.