Females with Type 2 Diabetes Mellitus Are Prone to Diabetic Retinopathy: A Twelve-Province Cross-Sectional Study in China

Table 1

Characteristics of participants.

	Total ()	Male ()	Female ()	value
Age (year)	61.9 (11.5)	60.2 (12.1)	63.3 (10.7)	<0.001
Duration of diabetes (years)	5.0 (2.0-10.0)	5.0 (2.0-10.0)	6.0 (2.0-10.0)	<0.001
Hypertension, (%)	6434 (50.4)	2708 (45.4)	3726 (54.8)	<0.001
Regional economic level, (%)				<0.001
T1 (Sichuan, Gansu, Hebei, Shanxi, Jiangxi, Yunnan, Shaanxi, Henan, Hubei, Hunan, and Guizhou)	5139 (40.3)	2237 (37.5)	2902 (42.7)
T2 (Guangdong, Zhejiang, Fujian, Shandong, and Inner Mongolia)	6399 (50.1)	3112 (52.2)	3287 (48.3)
T3 (Beijing, Jiangsu)	1228 (9.6)	614 (10.3)	614 (9.0)

Data are the mean (standard deviation), median (25th to 75th percentiles), or (%); the cities were tertiled by the regional economic level according to the data of 2018 per capita gross regional product from the National Bureau of Statistics. T1 referred to 31,336.13-67,627.83, T2 referred to 67,627.83-103,919.54, and T3 referred to 103,919.54-140,211.24.