Yong-Moon Park1, Seung-Hyun Ko2, Jung-Min Lee2, Dae-Jung Kim3, Dong-Joon Kim4, Kyungdo Han5, Julie K Bower6, Yu-Bae Ahn7. 1. Department of Preventive Medicine, The Catholic University of Korea, Seoul, Republic of Korea; Department of Epidemiology and Biostatistics, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA. 2. Division of Endocrinology and Metabolism, Department of Internal Medicine, The Catholic University of Korea, Seoul, Republic of Korea. 3. Department of Endocrinology and Metabolism, Ajou University School of Medicine, Suwon, Republic of Korea. 4. Department of Internal Medicine, Inje University College of Medicine, Busan, Republic of Korea. 5. Department of Biostatistics, The Catholic University of Korea, Seoul, Republic of Korea. 6. Division of Epidemiology, The Ohio State University College of Public Health, Columbus, OH, USA. 7. Division of Endocrinology and Metabolism, Department of Internal Medicine, The Catholic University of Korea, Seoul, Republic of Korea. Electronic address: ybahn@catholic.ac.kr.
Abstract
AIMS: Few representative population-based data are available regarding glycaemic and HbA1c thresholds for detecting diabetic retinopathy (DR) in Asia. We investigated the association between DR and fasting plasma glucose (FPG) and HbA1c levels among Korean adults. METHODS: Using data from the Korea National Health and Nutrition Examination Survey (2011), a total of 5212 adults (≥19 years old) were analysed. When participants had diabetes mellitus and/or a suspicion of DR in two-field nonmydriatic fundus photography, seven standard photographs were obtained after pupil dilatation (75.9% of men, 75.0% of women among the subjects). DR was defined as the presence of ≥1 retinal microaneurysms or blot haemorrhages with or without more severe lesions. Receiver operating characteristic (ROC) curves were used to determine the optimal cut-off value for HbA1c or FPG. RESULTS: The overall glycaemic thresholds for DR were 6.3mmol/l for FPG and 6.2% (44mmol/mol) for HbA1c. The optimal thresholds did not differ by age group. The sensitivities and specificities were 82.6% and 91.2% for FPG and 93.9% and 89.7% for HbA1c, respectively. The diagnostic discrimination was better for HbA1c than FPG for DR-area under curve: 0.908 for FPG and 0.953 for HbA1c (p=0.007). After being controlled for other covariates, the odds ratio for the risk of DR increased significantly in a consistent way from 6.2% (44mmol/mol) for HbA1c and 6.3mmol/l for FPG. CONCLUSIONS: According to these nationally representative data, the current diabetes diagnostic values for FPG and HbA1c based on DR may be lower for the Korean population.
AIMS: Few representative population-based data are available regarding glycaemic and HbA1c thresholds for detecting diabetic retinopathy (DR) in Asia. We investigated the association between DR and fasting plasma glucose (FPG) and HbA1c levels among Korean adults. METHODS: Using data from the Korea National Health and Nutrition Examination Survey (2011), a total of 5212 adults (≥19 years old) were analysed. When participants had diabetes mellitus and/or a suspicion of DR in two-field nonmydriatic fundus photography, seven standard photographs were obtained after pupil dilatation (75.9% of men, 75.0% of women among the subjects). DR was defined as the presence of ≥1 retinal microaneurysms or blot haemorrhages with or without more severe lesions. Receiver operating characteristic (ROC) curves were used to determine the optimal cut-off value for HbA1c or FPG. RESULTS: The overall glycaemic thresholds for DR were 6.3mmol/l for FPG and 6.2% (44mmol/mol) for HbA1c. The optimal thresholds did not differ by age group. The sensitivities and specificities were 82.6% and 91.2% for FPG and 93.9% and 89.7% for HbA1c, respectively. The diagnostic discrimination was better for HbA1c than FPG for DR-area under curve: 0.908 for FPG and 0.953 for HbA1c (p=0.007). After being controlled for other covariates, the odds ratio for the risk of DR increased significantly in a consistent way from 6.2% (44mmol/mol) for HbA1c and 6.3mmol/l for FPG. CONCLUSIONS: According to these nationally representative data, the current diabetes diagnostic values for FPG and HbA1c based on DR may be lower for the Korean population.
Authors: Kyung Chul Yoon; Won Choi; Hyo Seok Lee; Sang-Duck Kim; Seung-Hyun Kim; Chan Yun Kim; Ki Ho Park; Young Jeung Park; Seung-Hee Baek; Su Jeong Song; Jae Pil Shin; Suk-Woo Yang; Seung-Young Yu; Jong Soo Lee; Key Hwan Lim; Kyung Won Oh; Se Woong Kang Journal: Korean J Ophthalmol Date: 2015-11-25