Falsely high glycated haemoglobin [HbA1C] because of haemoglobin OSU-Christiansborg


D. Kapoor, Centre for Diabetes and Endocrinology, Barnsley District General Hospital, Gawber Road, Barnsley S75 2EP, UK. Tel/Fax: 44 01226 777 947; E-mail: drdkapoor@yahoo.co.uk


Glycated haemoglobin (HbA1c) is routinely used to assess the degree of glycaemic control in diabetic patients. We report a case of a 73 year old diabetic woman who had an elevated HbA1c of 13.4%. She was on maximum oral hypoglycaemic agents and was commenced on insulin. However, her HbA1c continued to remain high at 20.4%. Subsequent tests revealed that she had a haemoglobin variant, Haemoglobin Osu-Christiansborg, causing the falsely high glycated haemoglobin.