7SF area UWFA area Eyes with lesion
outside of 7SF		 Ratio*
(P value)
Eyes with NV, numbers 50 57 7 -
NV counts in average
(ICC**, P value)		 2.59
(0.91, <0.001)		 4.25
(0.88, <0.001)		 - 1.66 (P<0.001)†
-
Eyes with NP, numbers 101‡ 101‡ 0 -
Area of NP in pixels, average
(ICC**, P value)		 9.45 × 104
(0.87, <0.001)		 15.37 × 104
(0.81, <0.001)		 - 1.62 (P<0.001) †
-
*Ratio of UWFA area to 7SF area.
**ICC (Intergrader Correlation Coefficient): Pearson’s correlation coefficient was used.
†Paired t-test was used to compare the average between 7SF and UWFA.
‡All 101 eyes diagnosed with Proliferative Diabetic Retinopathy (PDR) had a non-perfusion area.
UWFA: Ultra-Wide Field Angiography; SF: Standard Field; NV: Neovascularization; NP: Non-Perfusion
Table 2: Comparison of ultra-wide field angiography with 7 standard field angiography at initial angiography.