Table 3

Subgroup analysis of observation angle in telemedicine detection of absence of DR and mild NPDR

 Absence of DRMild NPDR
30°, 35°45–60°100–200°30°, 35°45–60°100–200°
Se (95% CI)90% (87% to 93%)80% (76% to 84%)94% (84% to 99%)77% (74% to 80%)72% (67% to 76%)83% (74% to 90%)
Sp (95% CI)95% (94% to 96%)94% (93% to 96%)99% (98% to 100%)91% (89% to 93%)84% (82% to 87%)95% (92% to 97%)
PLR (95% CI)16.17 (10.67 to 24.51)14.11 (7.20 to 27.67)95.82 (30.97 to 296.40)11.54 (5.08 to 26.24)4.63 (2.98 to 7.21)15.44 (9.52 to 25.04)
NLR (95% CI)0.12 (0.05 to 0.31)0.22 (0.14 to 0.34)0.07 (0.03 to 0.19)0.29 (0.22 to 0.39)0.32 (0.19 to 0.54)0.17 (0.09 to 0.34)
DOR (95% CI)159.55 (66.27 to 384.13)93.65 (31.39 to 279.41)1343.43 (279.51 to 6456.95)39.65 (19.40 to 81.04)14.83 (6.46 to 34.06)99.86 (44.93 to 221.92)
  • DOR, diagnostic OR; DR, diabetic retinopathy; NLR, negative likelihood ratio; NPDR, nonproliferative diabetic retinopathy; PLR, positive likelihood ratio; Se, sensitivity; Sp, specificity.