Table 1.
Characteristics of Study Sample by Risk Strata
| Risk Strata (Readmission Risk)a | No. of Unique Patients | Age, y Mean (SD) | Race No. (% White) | Sex No. (% Female) |
|---|---|---|---|---|
| No chronic conditions (<10%) | 13,212 | 12.2 (15.1) | 6,592 (50.1) | 6,892 (52.2) |
| Single chronic conditions (<10%) | 8,176 | 17.3 (16.6) | 3,598 (44.0) | 4,103 (50.2) |
| Multiple chronic conditions (<10%) | 9,705 | 36.2 (18.7) | 5,058 (52.1) | 5,937 (61.2) |
| Multiple chronic conditions (10%–19%) | 7,114 | 38.2 (18.6) | 3,672 (51.6) | 4,211 (59.2) |
| Multiple chronic conditions (20%–29%) | 4,135 | 39.2 (19.2) | 2,157 (46.9) | 2,227 (53.9) |
| Multiple chronic conditions (30%–39%) | 1,570 | 40.5 (19.6) | 736 (37.9) | 885 (56.4) |
| Multiple chronic conditions (≥40%) | 561 | 46.2 (16.6) | 225 (40.1) | 342 (61.0) |
| Total | 44,473 | 26.5 (21.1) | 22,038 (49.6) | 24,597 (55.3) |
a
Risk of readmission within 30 days.