Association Between Low Dose Acetylsalicylic Acid (ASA) and Proton Pump Inhibitors and Risk of Acute Myocardial Infarction or Coronary Heart Disease Death

Association Between Low Dose Acetylsalicylic Acid (ASA) and Proton Pump Inhibitors and Risk of Acute Myocardial Infarction or Coronary Heart Disease Death - Nested Case Control Analyses in a Cohort of Patients With Acute Serious Coronary Heart Disease

The purpose of this study is to estimate the risk of myocardial infarction (MI)/coronary death associated with use of monotherapy low dose ASA (single antiplatelet) as well as concomitant use of monotherapy low dose ASA and proton pump inhibitors (PPIs) in patients with serious coronary heart disease using two UK primary care databases.

Number of Anticipated Subjects: In case-control analysis: 10.000-15.000 participants

Inclusion Criteria:

• As above ( study population description).
• All individuals aged 50-84 years with at least one year of enrolment with the primary care physician (PCP) and a computerized prescription history of at least one year before the start of the study.

Exclusion Criteria:

• Recorded diagnosis of cancer prior to study start.
• Patients aged ≥ 70 years with a follow-up longer than one year if having fewer than two recorded consultations with a primary care physician (PCP) during their entire follow-up (proxy for incomplete and invalid data recording