Table 2 Results from aggregate segmented linear regression analyses estimating the absolute immediate, gradual, and overall (at 12 months post-intervention) effects of study interventions on receiving an average initial duration of ≥ 90 days across cardiac medications dispensed at index fill among post-myocardial infarction patients age 65 and older in Ontario, Canada from September 2015 to August 2018
Parameter | Estimate, % (95% CI) | P value |
|---|---|---|
Standardized prolonged discharge prescription forms plus education (2 sites, 1414 patients) | ||
Intercept (baseline percentage) | 4.76 (− 1.28 to 10.8) | .10 |
Pre-intervention slope (secular trend, per month) | 0.04 (− 0.40 to 0.47) | .83 |
Change in level post-intervention (immediate effect) | 4.02 (− 5.15 to 13.2) | .35 |
Change in trend post-intervention (gradual effect, per month) | 0.18 (− 1.06 to 1.43) | .73 |
Overall effect at 12 months post-intervention (combined immediate and gradual effect) | 6.19 (− 7.51 to 19.9) | .30 |
Education only (4 sites, 926 patients) | ||
Intercept (baseline percentage) | 6.16 (2.25 to 10.1) | .006 |
Pre-intervention slope (secular trend, per month) | 0.10 (− 0.19 to 0.39) | .47 |
Change in level post-intervention (immediate effect) | 3.24 (− 3.89 to 10.4) | .34 |
Change in trend post-intervention (gradual effect, per month) | − 0.48 (− 1.35 to 0.39) | .25 |
Overall effect at 12 months post-intervention (combined immediate and gradual effect) | − 2.55 (− 11.5 to 6.38) | .54 |
Control group (143 sites, 18556 patients) | ||
Intercept (baseline percentage) | 7.40 (6.63 to 8.17) | <.001 |
Pre-intervention slope (secular trend, per month) | − 0.02 (− 0.07 to 0.04) | .57 |
Change in level post-intervention (immediate effect) | − 0.10 (− 1.52 to 1.31) | .88 |
Change in trend post-intervention (gradual effect, per month) | − 0.01 (− 0.18 to 0.16) | .89 |
Overall effect at 12 months post-intervention (combined immediate and gradual effect) | − 0.23 (− 2.00 to 1.54) | .78 |