| Measure | Time; rate | Adjusted change, QIIP group v. control group (95% CI) | ||
|---|---|---|---|---|
| 12 mo before intervention or index date | 12 mo after intervention or index date | |||
| Emergency department visits per 100 patients per yr | ||||
| Canadian Triage and Acuity Scale score 1-3 | QIIP group | 20.8 | 24.7 | 0.1 (-1.3 to 1.5) |
| Control group | 22.0 | 24.9 | ||
| Canadian Triage and Acuity Scale score 4-5 (low acuity) | QIIP group | 36.7 | 29.3 | -1.0 (-3.3 to 1.2) |
| Control group | 28.8 | 24.6 | ||
| Hospital admission for ambulatory-care-sensitive condition per 10 000 patients per yr | ||||
| Overall | QIIP group | 52.8 | 51.5 | 3.0 (-5.0 to 11.0) |
| Control group | 42.7 | 42.1 | ||
| Diabetes | QIIP group | 8.0 | 8.4 | 0 (-3.0 to 3.0) |
| Control group | 7.5 | 7.2 | ||
| Asthma | QIIP group | 5.0 | 2.9 | -1.0 (-2.0 to 1.0) |
| Control group | 4.1 | 3.3 | ||
| Chronic obstructive pulmonary disease | QIIP group | 25.9 | 28.1 | 6.0 (1.0 to 11.0) |
| Control group | 18.5 | 18.3 | ||
| Cardiac heart failure | QIIP group | 13.9 | 12.1 | -3.0 (-6.0 to 1.0) |
| Control group | 12.7 | 13.2 | ||
| Hospital readmission (% of those admitted to hospital) | ||||
| Within 30 d | QIIP group | 5.5 | 5.5 | -0.03 (-0.08 to 0.08) |
| Control group | 5.1 | 5.3 | ||
| Within 1 yr | QIIP group | 17.0 | 17.4 | 0.2 (-1.1 to 1.6) |
| Control group | 15.8 | 15.9 | ||
Note: CI = confidence interval, QIIP = Quality Improvement and Innovation Partnership.
*Generalized linear regression adjusted for baseline value, sex, rurality, age and comorbidity (Johns Hopkins Adjusted Diagnosis Groups30).