[An epidemiological study on diabetic retinopathy among type 2 diabetic patients in Shanghai].
OBJECTIVE
To investigate the prevalence and risk factors of diabetic retinopathy (DR) among type 2 diabetic patients aged over 30 in Shanghai central area.


METHODS
1039 patients diagnosed with type 2 diabetes mellitus (DM) aged over 30 were investigated by randomized cluster sampling in Shanghai central area and data from 767 of those patients were analyzed.


RESULTS
(1) Among all of the 1534 digital ocular fundus images from 767 patients, 87.6% of the images from 672 patients were gradable. (2) Among all of the 672 patients with gradable ocular fundus images, the prevalence of non-proliferative diabetic retinopathy (NPDR) was 21.6%, while proliferative diabetic retinopathy (PDR) was 1.3%. The rates of mild, moderate and severe NPDR were 8.8%, 11.2% and 1.6% respectively. (3) DR patients were characterized with elder age, higher HbA1c, urea nitrogen and serum creatinine. DM duration and the level of fasting plasma glucose were risk factors for DR.


CONCLUSIONS
The overall prevalence of DR in type 2 diabetic patients aged over 30 in Shanghai central area was 22.9% and the DR risk factors were found to include duration of diabetes and fasting plasma glucose level.
Hu
Hai-Ying
HY
Department of Endocrinology and Metabolism, Huashan Hospital, Institute of Endocrinology and Diabetology, Fudan University, Shanghai 200040, China.
Lu
Bin
B
Zhang
Zhao-Yun
ZY
Mao
Lin-Yu
LY
Song
Xiao-Yan
XY
Dong
Xue-Hong
XH
Yang
Ye-Hong
YH
Zhou
Li-Nuo
LN
Li
Yi-Ming
YM
Zhao
Nai-Qing
NQ
Zhu
Xi-Xing
XX
Wang
Xuan-Chun
XC
Ye
Hong-Ying
HY
Hu
Ren-Ming
RM
D000368:Aged; D002681:China / Q000453:epidemiology; D016000:Cluster Analysis; D003924:Diabetes Mellitus, Type 2 / Q000150:complications*; D003930:Diabetic Retinopathy / Q000453:epidemiology*; D016021:Epidemiologic Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012307:Risk Factors