Glycosylated haemoglobin and prognosis in 10,536 people with cancer and pre-existing diabetes: A meta-analysis with dose-response analysis

To assess whether glycaemic control is associated with prognosis in people with cancer and pre-existing diabetes. In this pre-registered systematic review (PROSPERO: CRD42020223956), PubMed and Web of Science were searched on 25th Nov 2021 for studies investigating associations between glycosylated haemoglobin (HbA1c) and prognosis in people with diabetes and cancer.