Table 1.
Characteristics of Admissions Discharged to SNFs for Postacute Carea
| Category | Predictor Variable | Variable Value Breakdown | Cohort Count (Number of Admissions) | Hospital Readmission, Number (%) |
|---|---|---|---|---|
| Demographics | Age, y | <55 | 276 | 66 (23.9) |
| ≥55 to <65 | 700 | 141 (20.1) | ||
| ≥65 to <75 | 1,919 | 334 (17.4) | ||
| ≥75 to <85 | 2,970 | 520 (17.5) | ||
| ≥85 | 2,751 | 507 (18.4) | ||
| Sex | Female | 5,353 | 876 (16.4) | |
| Male | 3,263 | 692 (21.2) | ||
| Race | White | 8,298 | 1,514 (18.3) | |
| Nonwhite | 212 | 45 (21.2) | ||
| Unknown or missing | 106 | 9 (8.5) | ||
| Marital status | Married | 4,041 | 711 (17.6) | |
| Other | 4,575 | 857 (18.7) | ||
| Comorbidity | Charlson | >6 | 1,602 | 441 (27.5) |
| Comorbidity Index (count of diseases) | ≤6 | 7,014 | 1,127 (16.1) | |
| Prior health care use | ED visits in past 6 months | 0 | 5,287 | 774 (14.6) |
| 1–3 | 3,004 | 678 (22.6) | ||
| ≥4 | 325 | 116 (35.7) | ||
| Hospital stay in the past 6 months | 0 | 5,271 | 723 (13.7) | |
| 1–3 | 3,094 | 743 (24.0) | ||
| ≥4 | 251 | 102 (40.6) | ||
| Hospital events | Duration of index hospitalization | ≤3 d | 3,081 | 360 (11.7) |
| 4–7 d | 3,517 | 631 (17.9) | ||
| 8–14 d | 1,389 | 362 (26.1) | ||
| ≥15 d | 629 | 215 (34.2) | ||
| ICU admission during index hospitalization | Yes | 2,534 | 705 (27.8) | |
| No | 6,082 | 863 (14.2) | ||
| Delirium (Confusion Assessment Method) | Positive | 1,120 | 310 (27.7) | |
| Negative | 7,424 | 1,247 (16.8) | ||
| Braden score (pressure ulcer risk) | High risk | 5,385 | 1,145 (21.3) | |
| Low risk | 3,169 | 413 (13.0) | ||
| Fall risk | High risk | 3,658 | 814 (22.3) | |
| Low risk | 4,881 | 743 (15.2) | ||
| Advanced directives | Advanced directive on file | Yes | 4,948 | 933 (18.9) |
| No | 3,668 | 635 (17.3) | ||
| Laboratory testsc | Creatinine (Female, 0.6–1.1 mg/dL; male, 0.8–1.3 mg/dL) | Normal | 5,413 | 867 (16.0) |
| Abnormal | 2,799 | 658 (23.5) | ||
| N/A | 404 | 43 (10.6) | ||
| Hemoglobin (Female, 12.0–15.5 g/dL; male, 13.5–17.5 g/dL) | Normal | 787 | 122 (15.5) | |
| Abnormal | 7,057 | 1,316 (18.7) | ||
| N/A | 772 | 130 (16.8) | ||
| Potassium (3.6–5.2 mmol/L) | Normal | 7,631 | 1,382 (18.1) | |
| Abnormal | 688 | 148 (21.5) | ||
| N/A | 297 | 38 (12.8) | ||
| Sodium (135–145 mmol/L) | Normal | 6,832 | 1,204 (17.6) | |
| Abnormal | 1,484 | 327 (22.0) | ||
| N/A | 300 | 37 (12.3) |
Abbreviations: ED, emergency department; ICU, intensive care unit; N/A, not available; SNF, skilled nursing facility.
a
The study included 6,032 patients who had 8,616 SNF admissions.
b
Details about mobility are provided in Supplemental Table 2.
c
Reference values are shown.