Clinical Original Article
Application of HbA1C for diagnosing diabetes in Harbin
Yu Haiqiao, Cheng Weilun, Hong Xincai, Jia Yuru, Liu Siying, Quan Wei, Shang Weiwei, Zhou Yue, Li Jian, Yan Shuang
Published 2017-07-25
Cite as Chin J Endocrinol Metab, 2017,33(07): 562-566. DOI: 10.3760/cma.j.issn.1000-6699.2017.07.005
Abstract
ObjectiveTo evaluate the sensitivity and specificity of different HbA1C cutoff points for diabetes diagnosis in high risk outpatients in Harbin.
MethodsA total of 2 122 high risk outpatients(male 1 032 and female 1 090)for diabetes screening in the Fourth affiliated Hospital of Harbin Medical University from April 2013 to February 2015 were included in this study, with the average age of(49.26±13.00)year. Oral glucose tolerance tests(OGTT)were conducted and HbA1C levels were examined in these patients. The sensitivity and specificity of different HbA1C cutoff points were calculated and a receiver operator characteristic(ROC)curve was then built.
ResultsThe average level of HbA1C in these subjects was(6.45±1.72)%. The prevalence of diabetes was 41.85%. The area under ROC curve(AUC)was 0.89 with the optimal cutoff point of HbA1C 6.0% and 0.68 for the highest Yonden index. The sensitivity and specificity of HbA1C 6.0% were 84.01% and 83.67% respectively. The sensitivity and specificity of HbA1C 6.5% were 62.84% and 95.92%, respectively. The AUC of HbA1C≥6.5% was 0.732.
ConclusionHbA1C works well as the diagnostic standard for diabetes in high risk outpatients of Harbin city. The cutoff point of HbA1C 6.0% is suitable for screening diabetes in high risk population, and HbA1C 6.5% is appropriate for diabetes diagnosis, with high sensitivity and specificity. (Chin J Endocrinol Metab, 2017, 33: 562-566)
Key words:
HbA1C; Diabetes; Diagnosing; Cutoff point
Contributor Information
Yu Haiqiao
Endocrinology and Metabolism Department, the Fourth affiliated Hospital of Harbin Medical University, Harbin 150001, China
Cheng Weilun
Hong Xincai
Jia Yuru
Liu Siying
Quan Wei
Shang Weiwei
Zhou Yue
Li Jian
Yan Shuang