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Table 1 Background characteristics of study group

From: Psychometric validation of the visual function questionnaire-25 in patients with diabetic macular edema

Characteristic Baseline (week 0) N = 235
Age (years)  
Mean ± SD 62 ± 10
Median (IQR) 62 (56 – 69)
Range 20 – 83
Female, n (%) 102 (43.4)
Ethnicity, n (%)  
Caucasian/White 192 (81.7)
Asian 25 (10.6)
Other (Black, Hispanic/Latino, unspecified) 18 (7.6)
ECOG Performance Status  
Mean ± SD 0.5 ± 0.5
Median (IQR) 0 (0 – 1)
Range 0 – 2
Type II diabetes, n (%) 218 (92.8)
Duration of vision problems, n (%)  
None 1 (0.4)
<1 year 93 (39.6)
1-5 years 122 (51.9)
6-10 years 15 (6.4)
>11 years 4 (1.7)
ETDRS visual acuity scale: study eye  
85 letters or more (20/16 or more) 0 (0.0)
85-75 letters (20/20 - 20/32) 0 (0.0)
74-70 letters (20/40) 3 (1.3)
69-55 letters (20/50 - 20/80) 160 (68.1)
54-40 letters (20/100 - 20/160) 61 (26.0)
39-35 letters (20/200) 11 (4.7)
34 letters or less (20/250 or less) 0 (0.0)
ETDRS visual acuity scale: fellow eye  
85 letters or more (20/16 or more) 11 (4.7)
85-75 letters (20/20 - 20/32) 75 (32.2)
74-70 letters (20/40) 30 (12.9)
69-55 letters (20/50 - 20/80) 60 (25.8)
54-40 letters (20/100 - 20/160) 31 (13.3)
39-35 letters (20/200) 9 (3.9)
34 letters or less (20/250 or less) 14 (6.0)
Counting fingers-hand motion 3 (1.3)
  1. * ETDRS = Early Treatment Diabetic Retinopathy Study.
  2. Note: Percentages are based on non-missing categories.