Table 1.
Characteristics of participants.
| Total (N = 12766) | Male (N = 5963) | Female (N = 6803) | P 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, n (%) | 6434 (50.4) | 2708 (45.4) | 3726 (54.8) | <0.001 |
| Regional economic level, n (%) | <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 n (%); 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.