Table 5

Individual image evaluation and suggested follow-up
Images with diabetic retinopathy (n =518) Images without diabetic retinopathy (n =518)
True positive sensitivity False negative True negative specificity False positive
n % n % n % n %
Screening standard set to meet a 414 80 104 20 492 95 26 5
n % (95%CI) n % (95%CI) n % (95%CI) n % (95%CI)
Optometrists’ image evaluation 348 67 (62 to 72) 170 32 (28 to 38) 437 84 (80 to 89) 81 16 (11 to 20)
Further managementb
 None / Routine follow up 5 1 (0 to 3) 113 66 (59 to 74) 296 68 (64 to 72) 3 4 (0 to 8)
 Report / referral to general practitioner 84 24 (20 to 29) 41 24 (18 to 21) 69 16 (12 to 19) 39 48 (37 to 59)
 Report / referral to ophthalmologist 255 74 (70 to 79) 16 9 (5 to 14) 71 16 (13 to 20) 39 48 (37 to 59)

a British Diabetic Association. Retinal photographic screening for diabetic eye disease. A British Diabetic Association Report. London: British Diabetic Association; 1997.

b Data missing for 5 image evaluations.

Sundling et al.

Sundling et al. BMC Health Services Research 2013 13:17   doi:10.1186/1472-6963-13-17

Open Data