Table 1.

Search strategy for Medline

“glycosylated haemoglobin” OR “HbA1c” OR “haemoglobin levels” OR “glycated haemoglobin” OR “haemoglobin A1c”

AND

Cardiovascular OR ‘cardiovascular disease’ OR ‘coronary heart disease’ OR ‘heart failure’ OR Stroke OR ‘peripheral arterial disease’ OR ‘cardiovascular events’ OR ‘coronary artery disease’ OR ‘myocardial infarction’ OR ‘cardiovascular outcomes’ OR mortality OR ‘all-cause mortality’ OR ‘cardiovascular mortality’ OR ‘cause-specific mortality’ OR death OR ‘cardiovascular death’

AND

‘observational study’ OR ‘cohort study’ OR ‘population-based