Coronary disease & ACS

Hospital Variation in Adherence Rates to Secondary Prevention Medications and the Implications on Quality

CirculationPublished Retrospective cohort study

Main finding · MACEResult — go to the resultAdjusted hazard ratio 0.88 95% CI 0.80–0.96

Authors' conclusion

Use of secondary prevention medications after discharge varies significantly among US hospitals and is inversely associated with 2-year outcomes.

Study context

Population
Medicare patients discharged after acute myocardial infarction (MI) from US hospitals, 2007–2010
Participants
19,704 patients347 US hospitals
Exposure
Hospitals with highest vs lowest quartile of 90-day composite medication adherence
Outcome
MACE
Follow-up
2 years
Methodological detailsregistry-based (ACTION Registry-GWTG), linked Medicare Part D data
  • Registry-based (ACTION Registry-GWTG)
  • Linked Medicare Part D data

Main finding

As reported in the abstract

Adjusted hazard ratio

0.88

95% CI 0.80–0.96

By group

Highest adherencevs Lowest quartile
adjusted HR 0.88 (95% CI 0.80–0.96)

Observational data: associations, not effects.

Further findings

90-day adherence to discharge medications, overall (PDC >80%) · 90 days after MI

β-blockers
68%
Statins
63%
ACEi/ARB
64%
Thienopyridines
72%

Hospital variation in 90-day adherence (PDC >80%) · up to 90 days

β-blockers
59% to 75%
Statins
55% to 69%
Thienopyridines
64% to 77%
ACEi/ARB
57% to 69%
Adherence varied significantly among hospitals

Death or readmission

High-adherence hospitals had lower adjusted rates of death or readmission
HR 0.90 (0.85-0.96) (95% CI)

Mortality

No difference in mortality after adjustment
  • Adjusted

Original publication

Hospital Variation in Adherence Rates to Secondary Prevention Medications and the Implications on Quality. Circulation. Published 31 January 2018. doi:10.1161/circulationaha.117.029160

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