Table 3.
Adjusted Hazard Ratios Derived from Modeling Time to First Hospital Readmission within 90 days after Discharge.
| Characteristic | Sample (n=25,905) | Unadjusted rate for 90-day readmission | Adjusted HR (95% CI) |
|---|---|---|---|
| Age group | |||
| 66-69 | 2,625 (11.6) | 763 (27.9) | REF |
| 70-74 | 3,843 (17.0) | 1,178 (28.7) | 1.01 (0.92 - 1.11) |
| 75-79 | 4,207 (18.6) | 1,433 (30.7) | 1.06 (0.97 - 1.15) |
| 80-84 | 4,757 (21.1) | 1,617 (29.6) | 0.99 (0.91 - 1.08) |
| 85-89 | 4,230 (18.7) | 1,499 (29.6) | 0.98 (0.90 - 1.07) |
| 90+ | 2,923 (12.9) | 1,092 (28.2) | 0.93 (0.85 - 1.03) |
|
| |||
| Sex | |||
| Male | 9,558 (42.3) | 3,492 (32.0) | REF |
| Female | 13,027 (57.7) | 4,090 (27.3) | 0.80 (0.76 - 0.83) |
|
| |||
| RTI Race * | |||
| White | 17,885 (79.2) | 5,920 (28.9) | REF |
| Black | 942 ( 4.2) | 429 (37.7) | 1.33 (1.20 - 1.46) |
| Hispanic | 3,147 (13.9) | 1,060 (29.4) | 0.99 (0.92 - 1.06) |
| Other† | 611 ( 2.7) | 173 (25.7) | 0.85 (0.73 - 0.99) |
|
| |||
| Year of admission | |||
| 2014 | 4,081 (18.1) | 1,405 (29.3) | REF |
| 2015 | 4,752 (21.0) | 1,629 (29.5) | 0.99 (0.92 - 1.07) |
| 2016 | 6,663 (29.5) | 2,194 (29.0) | 0.96 (0.90 - 1.03) |
| 2017 | 7,089 (31.4) | 2,354 (29.3) | 0.99 (0.92 - 1.05) |
|
| |||
| Prior Residence | |||
| Community | 22,218 (98.4) | 7,187 (29.0) | REF |
| Nursing Home | 367 ( 1.6) | 395 (34.4) | 1.12 (1.00 - 1.25) |
|
| |||
| Destination | |||
| Home | 12,387 (47.8) | 3,019 (24.4) | REF |
| SNF | 8,199 (31.7) | 2,831 (34.5) | 1.56 (1.48 - 1.65) |
| IRF | 4,547 (17.6) | 1,531 (33.7) | 1.49 (1.40 - 1.59) |
| Nursing Home | 772 ( 3.0) | 201 (26.0) | 1.06 (0.91 - 1.24) |
|
| |||
| Prior PCP | |||
| No | 6,938 (30.7) | 2,291 (26.4) | REF |
| Yes | 15,647 (69.3) | 5,291 (30.7) | 1.23 (1.17 - 1.30) |
|
| |||
| Medicaid | |||
| No | 19,015 (84.2) | 5,873 (28.6) | REF |
| Yes | 3,570 (15.8) | 1,709 (31.9) | 1.11 (1.04 - 1.18) |
|
| |||
| Prior TBI DX (outpatient) | |||
| No | 13,490 (59.7) | 4,346 (28.6) | REF |
| Yes | 9,095 (40.3) | 3,236 (30.2) | 1.05 (1.01 - 1.10) |
|
| |||
| Injury Severity Score (RISS) | |||
| 1st (0, 3) | 6,929 (30.7) | 2,329 (29.8) | REF |
| 2nd (4, 9) | 4,809 (21.3) | 1,557 (27.9) | 0.90 (0.84 - 0.96) |
| 3rd (10, 15) | 5,799 (25.7) | 2,049 (30.3) | 0.98 (0.92 - 1.04) |
| 4th (16, 66) | 5,048 (22.4) | 1,647 (28.6) | 0.92 (0.86 - 0.98) |
Note. Patients were excluded from the analysis if they were transferred to another hospital upon discharge (n=1,080).
HR: Hazard Ratio; CI: Confidence Interval; DX: Diagnosis; LOS: Length of Stay; PCP: Primary care provider; RISS: Injury Severity Score using R software; TBI: Traumatic Brain Injury.
*
RTI Race code includes both race and ethnicity.
†
The RTI “other” race category included patients classified as Asian/Pacific Islander race, American Indian/Alaska Native race, other races, and unknown race.