Table 1

Gradable rates and distribution of DR severity

Per eye (n = 3,978)Per patient* (n = 1,989)
Gradable for severity of DR at reading center3,769 (94.7)1,931 (97.1)
Gradable for presence of DME at reading center3,704 (93.1)1,912 (96.1)
Presence of referable DR at reading center580 (15.3)344 (17.8)
DR severity
 No DR2,393 (63.5)1,109 (57.4)
 Very mild NPDR491 (13.0)304 (15.7)
 Mild NPDR362 (9.6)217 (11.2)
 Moderate NPDR230 (6.1)131 (6.8)
 Severe NPDR63 (1.7)37 (1.9)
 Very severe NPDR4 (0.1)2 (0.1)
 PDR214 (5.7)124 (6.4)
 PDR with high-risk characteristics9 (0.2)7 (0.4)
DME present262 (7.1)178 (9.3)
  • Data are n (%). Referable DR is defined as moderate NPDR or worse, PDR, or presence of DME.

  • *When DR severity was evaluated per patient rather than per eye, the more severe level of DR and DME present in either eye was used as the severity present in the patient. If one eye was ungradable, the level of DR and DME present in the gradable eye was considered the level of DR and DME present in the patient.