
To determine whether achieving early glycaemic control and any subsequent glycaemic variability was associated with any change in the risk of major adverse cardiovascular events (MACE). A retrospective cohort analysis from the Oxford‐Royal College of General Practitioners Research and Surveillance Centre database was conducted. We followed newly diagnosed patients with type 2 diabetes, on or after 1 January 2005, aged 25 years or older at diagnosis, with HbA1c measurements at both diagnosis and after 1 year, plus five or more measurements of HbA1c thereafter. From 26 180 patients, there was 2300 MACE. Compared with the lowest glycaemic variability score, the greatest variability increased the risk of MACE. Early control of HbA1c improved cardiovascular outcomes in type 2 diabetes, although subsequent glycaemic variability had a negative effect on an individual's risk.
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