Screening for Diabetic Retinopathy with a Nonmydriatic Ultra-Wide-Field Retina Camera by Family Medicine Physicians

Article Figures & Data

Table 1.

Initial Estimates of Diagnostic Accuracy of Interpretation of Retinal Images of 34 Patients by Family Physicians

	DR Finding	Presumed DR	No DR	Total	Fraction (%)	95% CI, %
Retinal specialist results	3	—	31	34	3/34 (8)	(2-24)
Family physician results	1	7	26	34	8/34 (24)	(11-41)
Sensitivity					1/3 (33)	(1-91)
Specificity					24/31 (77)	(59-90)
PPV					1/8 (13)	(0-53)
NPV					24/26 (92)	(75-99)
Accuracy					25/34 (74)	(56-87)

DR, diabetic retinopathy; NPV, negative predictive value; PPV, positive predictive value; CI, confidence interval.

Table 2.

Patient Follow-Up Survey

Question	No. of Responses	N (%)
Did you find the retinal imaging an easy/efficient way of screening for eye disease as a result of having diabetes?	31
Yes		28 (90)
No		1 (3)
Unknown		2 (7)
If you had to pay for retinal imaging out-of-pocket what is the maximum amount you would be willing to pay?	30
$25		7 (23)
$50		14 (47)
$75		3 (10)
$100		2 (7)
Unknown		4 (13)

Appendix Supplementary Table 1.

Accuracy of phase 1 and phase 2 results by physician