Open AccessCutoff Point of HbA1c for Diagnosis of Diabetes Mellitus in Chinese Individuals
Author(s) -
Bing Wang,
Ming-Chuan Liu,
Xinyu Li,
Xuhan Liu,
Qi Sheng Feng,
Lu Lu,
Zhu Zhu,
Yingshu Liu,
Wei Zhao,
Zhengnan Gao
Publication year - 2016
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0166597
Subject(s) - receiver operating characteristic , medicine , diabetes mellitus , glycated hemoglobin , cutoff , diabetic retinopathy , chinese population , retinopathy , area under the curve , ophthalmology , chinese people , population , endocrinology , type 2 diabetes , biochemistry , chemistry , physics , environmental health , quantum mechanics , political science , genotype , china , law , gene
Background The purpose of the present study was to find the optimal threshold of glycated hemoglobin (HbA1c) for diagnosis of diabetes mellitus in Chinese individuals. Methods A total of 8 391 subjects (including 2 133 men and 6 258 women) aged 40–90 years with gradable retinal photographs were recruited. The relationship between HbA1c and diabetic retinopathy (DR) was examined. Receiver operating characteristic (ROC) curves were used to find the optimal threshold of HbA1c in screening DR and diagnosing diabetes. Results HbA1c values in patients with DR were significantly higher than in those with no DR. The ROC curve for HbA1c had an area under the curve of 0.881 (95%CI 0.857–0.905; P = 0.000). HbA1c at a cutoff of 6.5% had a high sensitivity (80.6%) and specificity (86.9%) for detecting DR. Conclusions HbA1c can be used to diagnose diabetes in a Chinese population, and the optimal HbA1c cutoff point for diagnosis is 6.5%.