Effect of microcytosis on HbA1c values in non-diabetic persons.
Background: Glycated haemoglobin is a necessary test for assessment of control, compliance, modifying management, follows up and nowadays for diagnosis of patients with prediabetes and diabetes mellitus. Microcytosis, which is a laboratory finding that found in a wide range of common diseases, appear to be found in a significant percent of diabetic and non-diabetic persons and may affect the measured glycated haemoglobin values. Aim of study: This study tries to evaluate the effect of microcytosis in non-diabetic subjects on the level of haemoglobin A1c (HbA1c %). Patients and methods: HbA1c% measured in 80 non-diabetic patients with microcytosis after exclusion of factors that may affect the results compared to 80 healthy subjects with normocytic blood picture as a control group. Results: The HbA1c level were significantly higher among patients with microcytosis as compared to normocytic control group. The mean HbA1c (5.8± 0.9%) in the patients was higher than that in the control group (5.3% ± 0.7) (p = 0.001). Conclusions: Microcytosis may affect significantly the HbA1c results and may wrongly affect management decisions in diabetic patients.