Overtreatment of older patients with type 2 diabetes mellitus in primary care

Given that there are indications of overtreatment in older patients with type 2 diabetes in both the United States and Europe, we assessed the level of personalized diabetes treatment for older patients in primary care, focusing on overtreatment. Based on Dutch guidelines individuals aged 70years were classified into 3 glycated haemoglobin (HbA1c) treatment target groups: 7% (53 mmol/mol), 7.5% (58 mmol/mol) and 8% (64 mmol/mol). In our cohort of 1002 patients (n=319 aged >= 70years), the 165 patients with HbA1c targets >7% had more micro- and macrovascular complications, more often used >= 5 medicines and were more often frail compared with those with an HbA1c target 7%. Of these 165 patients, 64 (38.8%) were overtreated; that is, 20% of all people aged >= 70 years. The majority of overtreated people were frail and used >= 5 medicines. Hypoglycaemia occurred in 20.3% of these patients and almost 30% reported accidents involving falls. Personalized treatment in older people with type 2 diabetes is not common practice. A substantial number of older people are overtreated, with probable harmful consequences. To prevent overtreatment, definition of lower HbA1c limits might be helpful.