Table 2. Demographic and clinical characteristics of the three groups.
ED: emergency department; SD: standard deviation; BMI: body mass index
| Variables | Returned to ED and admitted (n=17) | Returned to ED, not admitted (n=12) | No return to ED, not admitted (n=147) | P-value |
| Age, years, mean (SD) | 54.3 (16.3) | 48.9 (15.8) | 43.8 (15.6) | 0.02 |
| Male gender, n (%) | 12 (70.6%) | 5 (41.7%) | 53 (36.1%) | 0.02 |
| Race, n (%) | 0.78 | |||
| White | 12 (70.6%) | 10 (83.3%) | 105 (71.4%) | |
| Black | 2 (11.8%) | 1 (8.3%) | 27 (18.4%) | |
| Other | 3 (17.6%) | 1 (8.3%) | 15 (10.2%) | |
| BMI, kg/m2, mean (SD) | 32.2 (7.3) | 29.0 (6.5) | 32.8 (8.2) | 0.35 |
| Charlson Comorbidity Index total score, mean (SD) | 3.0 (3.3) | 1.9 (2.1) | 1.1 (2.0) | 0.001 |
| Cardiovascular disease, n (%) | 8 (47.1%) | 3 (25.0%) | 20 (13.6%) | 0.002 |
| Chronic obstructive pulmonary disease, n (%) | 9 (52.9%) | 4 (33.3%) | 40 (27.2%) | 0.09 |
| Diabetes, n (%) | 4 (23.5%) | 2 (16.7%) | 17 (11.6%) | 0.36 |