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Table 1 Summary of clinical and demographic characteristics of patients in Group 1 and Group 2

From: Predicting visual acuity in Bietti crystalline dystrophy: evaluation of image parameters

Variables All patients Group 1
(BCVA ≤ 20/200) (N = 14)
Group 2
(BCVA > 20/200) (N = 26)
p-value
Mean SD Mean SD Mean SD  
Age 46.80 12.20 52.21 13.47 43.88 10.60 *0.038
Follow-up (months) 30.70 28.39 28.27 27.99 35.21 29.61 0.747
Refractive error(D) −3.29 3.51 −2.26 2.65 −3.72 3.78 0.589
Central retinal thickness (μm) 267.18 52.18 256.86 39.40 272.73 57.86 0.366
Subfoveal Choroidal thickness (μm) 107.91 53.54 73.93 43.31 126.20 50.02 *0.002
N % N % N %  
Male 15 37.50 4 28.60 11 42.30 0.502
Crystalline deposits 35 87.50 10 71.40 25 96.20 *0.043
EZ disruption at fovea 18 45.00 13 92.90 5 19.20 * < 0.001
Outer retinal tubulation 20 50.00 5 35.70 15 57.70 0.185
Sclerotic vessels 35 87.50 13 92.90 22 84.60 0.640
FAF staging        0.122
 Stage 1 5 12.50 1 7.10 4 15.40 0.64
 Stage 2 17 42.50 5 35.70 12 46.20 0.524
 Stage 3 11 27.50 7 50.00 4 15.40 *0.029
  1. BCVA best corrected visual acuity, SD standard deviation, N number, EZ ellipsoid zone, FAF fundus autofluorescence
  2. *p < 0.05
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