Table 1

Summary of the data sets


Development setExternal validation set
TotalJSIECLEDRSPSubtotalLiuzhouSTU-2ndSubtotal
Camera typeAFC-230, Canon CR-DGi, Top-2000Top-2000AFC-230, Canon CR-DGiAFC-230, Canon CR-DGi, Top-2000AFC-230Top-2000AFC-230, Top-2000
PeriodsApril 2014–June 2018June 2016–June 2018April 2014–April 2016April 2014–June 2018June 2017–June 2018June 2016–June 2018June 2016–June 2018
Images, n/N (%)83 465/83 465 (100)2567/83 465 (3.1)52 313/83 465 (60.7)53 211/83 465 (63.8)12 898/83 465 (15.5)17 356/83 465 (20.8)30 254/83 465 (36.2)
Eyes, n/N (%)39 836/39 836 (100)2241/39 836 (5.6)24 299/39 836 (61.0)26 540/39 836 (66.6)6572/39 836 (16.5)6916/39 836 (17.4)13 488/39 836 (33.9)
Patients, n/N (%)21 716/21 716 (100)2051/21 716 (9.4)13 026/21 716 (60.0)15 077/21 716 (69.4)3298/21 716 (15.2)3512/21 716 (16.2)6810/21 716 (31.4)
Patients with sex available, n/N (%)17 042/21 716 (78.5)1804/2051 (88.0)8685/13 026 (66.7)10 489/15 077 (69.6)3298/3298 (100)3426/3512 (97.6)6724/6810 (98.7)
Male, n/N (%)7493/17 042 (44.0)932/1804 (51.66)3893/8685 (44.8)4825/10 489 (46.0)1284/3298 (38.9)1465/3426 (42.8)2749/6724 (40.9)
Patients with age available, n/N (%)20 150/21 716 (92.5)1804/2051 (88.0)11 793/13 026 (90.5)13 597/15 077 (90.2)3298/3298 (100)3426/3512 (97.6)6724/6810 (98.7)
Age, mean (SD), years60.0 (12.9)44.6 (18.8)61.4 (10.1)59.2 (13.0)65.2 (9.7)57.7 (13.9)61.4 (12.6)
  • JSIEC, Joint Shantou International Eye Center of Shantou University and the Chinese University of Hong Kong; LEDRSP, Lifeline Express Diabetic Retinopathy Screening Program; Liuzhou, Liuzhou City Red Cross Hospital; STU-2nd, Second Affiliated Hospital of Shantou University Medical College.