| Measure; group | Rate or mean (95% CI) | Pre-post difference, IRR (95% CI) | Difference-in-differences (95% CI) | |
|---|---|---|---|---|
| Before index date* | After index date | |||
| Hospital admissions† | ||||
| Health Links enrollees | 2.26 (2.06-2.49) | 2.07 (1.81-2.36) | 0.91 (0.79-1.05) | 1.74 (1.40-2.17) |
| Comparator group | 2.06 (1.89-2.26) | 1.08 (0.91-1.29) | 0.53 (0.44-0.63) | |
| Emergency department visits† | ||||
| Health Links enrollees | 3.02 (2.42-3.78) | 3.10 (2.09-4.59) | 1.02 (0.80-1.31) | 1.61 (1.18-2.20) |
| Comparator group | 3.52 (2.97-4.18) | 2.24 (1.72-2.9) | 0.64 (0.52-0.77) | |
| Days in acute care† | ||||
| Health Links enrollees | 18.4 (16.3-20.8) | 24.9 (20.7-30.0) | 1.35 (1.11-1.65) | 1.51 (1.06-2.15) |
| Comparator group | 19.9 (17.3-23.1) | 17.9 (13.5-23.8) | 0.90 (0.66-1.21) | |
| 30-day readmissions, %‡ | ||||
| Health Links enrollees | 30.4 (26.1-35.4) | 36.2 (31.2-41.9) | 1.19 (0.95-1.49) | 1.43 (0.96-2.13) |
| Comparator group | 25.6 (22.2-29.5) | 21.2 (16.2-27.8) | 0.83 (0.61-1.14) | |
| 7-day primary care follow-up, %‡ | ||||
| Health Links enrollees | 36.5 (32.6-41.9) | 37.5 (32.7-43.1) | 1.03 (0.88-1.20) | 1.01 (0.76-1.33) |
| Comparator group | 34.9 (31.0-39.3) | 35.7 (29.0-44.0) | 1.02 (0.82-1.28) | |
Note: CI = confidence interval, IRR = incidence rate ratio.
*All comparisons (enrollees v. comparator patients) were nonsignificant.
†Rate per person-year.
‡Per index hospital admission.