Definition

Use MODIFIED CALIBER 'Stable angina' phenotyping algorithm:

At the specified date, a patient is considered to have had 'Stable angina' IF they meet the criteria for any of the following on or before the specified date:

The earliest date on which the individual meets any of the following criteria on or before the specified date is defined as the first event date. Include terms for h/o 'Stable angina':

1. Recorded diagnosis:

   a) Primary care diagnosis of ischaemic chest pain: chest_pain_gprd, category 4

   b) Primary care diagnosis of 'Stable angina': sa_diagnosis_gprd, category 1, category 4

   c) Secondary care diagnosis of 'Stable angina': angina_hes, category 4

2. Coronary revascularisation without un'Stable angina' (phenotype_ua) or myocardial infarction (phenotype_mi) in the previous 30 days:

   a) Primary care record of percutaneous coronary intervention (PCI): pci_gprd, category 2

   b) Secondary care record of PCI: pci_opcs, category 2

   c) Primary care record of coronary artery bypass graft (CABG): cabg_gprd, category 2

   d) Secondary care record of CABG: cabg_opcs, category 2

3. Test results:

   a) Primary care record of abnormal stress echocardiogram: stress_echo_gprd, category 3

   b) Primary care record of abnormal invasive coronary angiogram: angio_gprd, category 3

   c) Primary care record of abnormal computed tomography coronary angiogram: ct_angio_gprd, category 3

   d) Primary care record of abnormal magnetic resonance coronary angiogram: mr_angio_gprd, category 3

   e) Primary care record of abnormal exercise ECG: eecg_gprd, category 3

   f) Primary care record of myocardial ischaemia on resting ECG: recg_gprd, category 2

   g) Primary care record of abnormal myocardial perfusion scan: radio_scan_gprd, category 3

Implementation

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