Trends and regional differences in glycemic control of patients with type 2 diabetes in China, 2009–2013

To the Editor:According to the International Diabetes Federation,China has been ranked first worldwide in terms of the prevalence of diabetes among people aged 20 to 79 years.[1]As a cornerstone in the management of patients with type 2 diabetes mellitus(T2DM),the level of glycemic control has changed considerably over the past decades.A multicenter observational study in North China showed that 45.82%of patients with T2DM met the glycated hemoglobin(HbA1c)control standard in 2017.[2]With the largest population of residents with T2DM,China is also faced with significant regional discrepancies in the rates of adequate glycemic control(HbA1c<7%),ranging from 25.9%in Shaanxi province[3]to 56.1%in Jiangsu province.[4]Indeed,previous studies in China were conducted for short periods of time,in a limited number of areas,and with relatively small sample sizes.Based on the data of the China National HbA1c Surveillance System study(CNHSS),this analysis aimed to investigate temporal trends and regional variations in glycemic control in T2DM patients in China from 2009 to 2013.