She works on the epidemiology of cardiovascular disease and has led large-scale randomized controlled trials.
[8] Armitage was Chief Investigator for the ASCEND aspirin trial, which studied cardiovascular disease in 15,480 patients with diabetes.
[9][10] ASCEND was the largest ever study that had every been performed to investigate whether aspirin should be used to prevent cardiovascular disease in diabetic patients.
She also investigated whether fish oil and vitamin D supplements reduced cardiovascular disease in diabetic patients, but found they had no impact.
[14] 2019 Awarded an Officer of the Order of the British Empire for services to medical research[15]