Correlation between optical coherence tomography-derived macular measurements and glycosylated haemoglobin, age, visual acuity and diabetes duration in patients with type 2 diabetes mellitus

This study aims to correlate optical coherence tomography (OCT)-derived macular measurements and glycosylated haemoglobin (haemoglobin A1c, HbA1c), age, visual acuity and the duration of diabetes in patients with type 2 diabetes mellitus (DM). In this observational, cross-sectional study, measurements for central macular thickness (CMT), average macular thickness (AMT) and macular volume (MV) were obtained using OCT in 165 eyes of 165 patients with type 2 diabetes mellitus. The level of HbA1c, age, visual acuity and duration of diabetes were taken and compared to the macular measurements. The mean age of the patients was 61.26 years. The duration of DM and level of HbA1c was 12.95 years and 8.10 %, respectively. HbA1c showed a modest, positive correlation with AMT ( r = 0.304, p