Br J Ophthalmol 2000;84:865-870
( August )
Diabetic retinopathy in Victoria, Australia: the Visual
Impairment Project
Robert McKay, Catherine A McCarty, Hugh R Taylor
Centre for Eye
Research Australia, University of Melbourne, Melbourne, Australia
Correspondence to: Cathy McCarty, Centre for Eye Research Australia, University of
Melbourne, Royal Victorian Eye and Ear Hospital, 32 Gisborne Street,
East Melbourne 3002, Victoria, Australia
cathy{at}cera.unimelb.edu.au
Accepted for publication 13 April 2000
AIM To establish the
prevalence, severity, and risk factors for diabetic retinopathy in a
representative sample of Victorian residents aged 40 years and older.
METHODSA population
based, cluster sampling method was used to recruit 4744 participants
(86% participation rate). Nine randomly selected, suburban Melbourne
clusters and four randomly selected, rural Victorian clusters were
used. Participants provided a detailed medical and personal history and
underwent an ocular examination including funduscopy and fundus
photography. Rural participants provided a blood sample, from which the
glycosylated haemoglobin percentage was measured. The diagnosis of
diabetic retinopathy was based on fundus photographs from participants
with self reported diabetes.
RESULTSThe prevalence
of diabetic retinopathy among people with self reported diabetes was
29.1%. The prevalence of untreated, vision threatening retinopathy was
2.8%. Retinopathy was positively associated with a longer reported
duration of diabetes diagnosis (p<0.01) and with higher fractions of
glycosylated haemoglobin (p<0.01). Retinopathy was not significantly
associated with age, ethnicity, body mass index, glaucoma, myopia or
intake of alcohol, tobacco, or aspirin (all p > 0.05).
CONCLUSIONSMost
people in Victoria with proliferative diabetic retinopathy or
clinically significant macular oedema have received laser treatment.
There remains however, a small but important group who have not
received treatment and whose vision is threatened. People with diabetes
should be encouraged to maintain strict glycaemic control and to
undergo regular screening to delay or prevent the development of retinopathy.
© 2000 by British Journal of Ophthalmology
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