Compound Danshen Dripping Pill for Treating Early Diabetic Retinopathy: A Randomized, Double-Dummy, Double-Blind Study

Table 1

Basic characteristics of study subjects.

Characteristic	The treated group	The control group
Age (years)	59.54 ± 7.46 (range: 43–67)	57.86 ± 10.03 (range: 45–64)
Gender, number (%)
Male	18 (64.3%)	19 (65.5%)
Female	10 (35.7%)	10 (34.5%)
Mean duration (years)	14.52 ± 3.29 (range: 7–21)	15.74 ± 3.63 (range: 9–21)
Diagnosis, eye/number
Mild NPDR	18	19
Moderate NPDR	22	25
Severe NPDR	16	14