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Am J Ophthalmol. 2006 May;141(5):951-3.

Hemoglobin A1c awareness among patients receiving eye care at a tertiary ophthalmic center.

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  • 1Department of Ophthalmology, Retina Division of the Wilmer Eye Institute, Johns Hopkins University School of Medicine, 600 North Wolfe Street, Baltimore, MD 21287, USA.



To describe awareness of hemoglobin A1c (HbA1c) among patients receiving eye care at a tertiary ophthalmic center for diabetic eye disease.


Prospective, nonrandomized clinical case series.


One hundred-fifty adult patients with diabetes mellitus (DM) examined between July and October of 2003 for diabetic retinopathy (DR) were surveyed about HbA1c knowledge.


Seventy-six (51%) understood HbA1c, 25 (17%) were not sure if they understood, and 49 (33%) did not understand. Patients who understood HbA1c based on duration of DM were as low as two (29%) of seven with DM < 5 years and as high as 17 (55%) of 31 with DM > 15 years. Seventy-six (51%) had proliferative DR, among whom 33 (43%) understood HbA1c, 69 (46%) had nonproliferative DR, among whom 39 (57%) understood HbA1c, and five (3%) had no DR, among whom four (80%) understood HbA1c.


Approximately half of diabetic patients surveyed understood HbA1c.

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