Fig. 4
From: Change in subfoveal choroidal thickness in diabetes and in various grades of diabetic retinopathy
Comparison of average subfoveal choroidal thickness (with 95% confidence intervals) in normal subjects versus that in diabetic subjects with different severities of non-proliferative diabetic retinopathy (NPDR) and in proliferative diabetic retinopathy (PDR). Group R1, mild NPDR; group R2, moderate NPDR; group R3, severe NPDR; group R4, PDR; group N, normal subjects. All P-values are with respect to group N