Descriptive Statistics of Independent Variables for the Cohort by Group
| Characteristic | Not Readmitted | Readmitted | P-Value* |
|---|---|---|---|
| N | 12,965 | 1697 | |
| Age, mean (SD) | 61.2 (19.3) | 64.1 (19.3) | <.001 |
| Sex | |||
| Female (%) | 7034 (54.3%) | 901 (53.1%) | |
| Male (%) | 5931 (45.7%) | 796 (46.9%) | .379 |
| Marital status | |||
| Not married (%) | 5114 (39.4%) | 734 (43.3%) | |
| Married (%) | 7851 (60.6%) | 963 (56.7%) | .003 |
| Carlson Comorbidity Index, mean (SD) | 3.3 (3.3) | 4.9 (3.7) | <.001 |
| Length of stay, mean (SD), days | 3.2 (3.6) | 4.7 (6.2) | <.001 |
| Previous 6 months ED Visits, mean (SD) | 0.8 (1.6) | 1.2 (2.2) | <.001 |
| Previous 12 months Hospitalizations, mean (SD) | 0.1 (0.5) | 0.3 (1.0) | <.001 |
| Previous 12 months Outpatient Visits, mean (SD) | 9.8 (9.2) | 12.4 (12.3) | <.001 |
| No. Distinct providers, 12 months, mean (SD) | 6.4 (5.1) | 7.7 (6.5) | <.001 |
| UPC, mean (SD) | 0.39 (0.22) | 0.37 (0.22) | <.001 |
| COC, mean (SD) | 0.12 (0.16) | 0.12 (0.16) | .101 |
| SECON, mean (SD) | 0.15 (0.19) | 0.14 (0.19) | .869 |
| VE, mean (SD) | 3.49 (0.68) | 3.54 (0.70) | <.001 |
Abbreviations: COC, dispersion continuity of care; SECON, sequence continuity; UPC, usual provider continuity; VE, visit entropy.
↵* P-values are Fishers exact test for two valued nominal variables, Chi-Square test for multiple valued nominal variables, and Wilcoxon rank sum for continuous variables.