Table 1

Demographic factors and baseline clinical characteristics of the study population

SeattleAtlantaTotal
Patients, n13,43910,28523,724
Age (years)
 Mean (SD)62.20 (10.91)63.46 (10.14)62.75 (10.60)
 Range21–9724–9821–98
Male sex12,724 (94.68)9,795 (95.24)22,519 (94.92)
Race
 White9,482 (70.56)4,678 (45.48)14,160 (59.69)
 African American1,642 (12.22)5,085 (49.44)6,727 (28.35)
 Asian383 (2.85)34 (0.33)417 (1.76)
 Other605 (4.50)90 (0.88)695 (2.93)
 Unknown1,327 (9.87)398 (3.87)1,725 (7.27)
Encounters, n21,79713,10434,901
Retinopathy grade
 No DR15,270 (70.05)11,166 (85.21)26,436 (75.75)
 Mild NPDR2,364 (10.85)957 (7.31)3,321 (9.51)
 Moderate NPDR494 (2.27)311 (2.37)805 (2.31)
 Severe NPDR110 (0.50)153 (1.17)263 (0.75)
 PDR22 (0.10)193 (1.47)215 (0.62)
 Ungradable3,537 (16.23)324 (2.47)3,861 (11.06)
Images, n199,142112,462311,604
  • Data are n (%) unless otherwise indicated.