Table 1.
Patient characteristics.
| Cohort | No unplanned readmission within 1 yr | Unplanned readmission within 1 yr | P value | |
|---|---|---|---|---|
| N = 148 | N = 108 | N = 40 | ||
| Age in years, mean (SD) | 42.4 (15.6) | 41.3 (16.6) | 45.3 (12.3) | .162 |
| Male gender, n (%) | 120 (81.1) | 88 (81.5) | 32 (80.0) | .817 |
| Race, n (%) | .078 | |||
| White | 91 (61.5) | 70 (64.8) | 21 (52.5) | |
| Black | 30 (20.3) | 19 (17.6) | 11 (27.5) | |
| Hispanic | 7 (4.7) | 6 (5.6) | 1 (2.5) | |
| Native American or Alaskan | 14 (9.5) | 7 (6.5) | 7 (17.5) | |
| Other or unknown | 6 (4.1) | 6 (5.6) | 0 (0) | |
| Marital status, n (%) | .507 | |||
| Single | 106 (71.6) | 77 (71.3) | 29 (72.5) | |
| Married or partnered | 20 (13.5) | 17 (15.7) | 3 (7.5) | |
| Divorced or separated | 15 (10.1) | 9 (8.3) | 6 (15.0) | |
| Widow | 4 (2.7) | 3 (2.8) | 1 (2.5) | |
| Unknown | 3 (2.0) | 2 (1.9) | 1 (2.5) | |
| Stable living situation, n (%) | 97 (67.8) | 78 (75.0) | 19 (48.7) | .005 |
| Intoxication on admission, n (%) | 98 (66.2) | 71 (65.7) | 27 (67.5) | 1.000 |
| History of drug and/or alcohol use, n (%) | 54 (36.5) | 37 (34.3) | 17 (42.5) | .442 |
| Substance use disorder, n (%) | 99 (66.9) | 65 (60.2) | 34 (85.0) | .005 |
| Other psychiatric disorder, n (%) | 83 (56.1) | 55 (50.9) | 28 (70.0) | .042 |
| Charlson Comorbidity Index, mean (SD) | 0.9 (1.6) | 0.9 (1.6) | 1.1 (1.5) | .625 |
| Charlson Comorbidity Index 10-yr survival %, mean (SD) | 90.0 (19.7) | 90.0 (20.2) | 90.0 (18.6) | .936 |
| ED or hospital admissions in 1 yr prior to frostbite admission, n (%) | 69 (46.6) | 42 (38.9) | 27 (67.5) | .003 |
| History of frostbite injury, n (%) | 15 (10.1) | 9 (8.3) | 6 (15.0) | .234 |
| LOS days, mean (SD) | 8.1 (8.7) | 8.1 (9.6) | 7.9 (6.1) | .867 |
| Thrombolytics, n (%) | 94 (63.5) | 68 (63.0) | 26 (65.0) | .850 |
| Any surgical intervention, n (%) | 62 (41.9) | 36 (33.3) | 26 (65.0) | .001 |
| Amputation, n (%) | 27 (18.2) | 18 (16.7) | 9 (22.5) | .474 |
| Medical discharge disposition, n (%) | .016 | |||
| Home or stable housing | 74 (50) | 59 (54.6) | 15 (37.5) | |
| Homeless shelter | 14 (9.5) | 5 (4.6) | 9 (22.5) | |
| Inpatient psychiatry | 13 (8.8) | 11 (10.2) | 2 (5.0) | |
| Other healthcare facility | 38 (25.7) | 26 (24.1) | 12 (30.0) | |
| Against medical advice (to various locations) | 9 (6.1) | 7 (6.5) | 2 (5.0) | |
| Mortality in 1-yr follow-up, n (%) | 4 (2.7) | 0 (0) | 4 (10.0) | .005 |
ED = emergency department, LOS = length of hospital stay, SD = standard deviation.