British Journal of Ophthalmology 2002;86:1014-1018
© 2002 British Journal of Ophthalmology
Diabetic retinopathy among self reported diabetics in southern India: a population based assessment
V Narendran,
R K John,
A Raghuram,
R D Ravindran,
P K Nirmalan,
R D Thulasiraj
Aravind Medical Research Foundation, Aravind Eye Care System, Tamil Nadu, India
Correspondence to:
Correspondence to:
Praveen K Nirmalan, Aravind Eye Care System, LAICO, 72, Kuruvikaran Salai, Gandhi Nagar, Madurai, Tamil Nadu-625020, India;
praveen{at}aravind.org
Aims: To estimate the prevalence of diabetic retinopathy among self reported diabetics in a population of southern India.
Methods: A cross sectional sample of subjects aged 50 years and older was selected using a cluster sampling technique from Palakkad district of Kerala state. Eligible subjects were identified through a door to door survey. Ocular examinations including visual acuity and anterior and posterior segment examinations were performed at preselected sites within clusters. History of diabetes was elicited, and height, weight, and blood pressure were measured for all subjects.
Results: Among the 5212 examined people (92% response rate), 68 (26.2%) of 260 people with self reported history of diabetes had diabetic retinopathy. The age-sex adjusted prevalence of diabetes among people aged 50 years and older was 5.1% (95% CI 3.9, 6.3, deff 4.33) and of diabetic retinopathy among the diabetics was 26.8% (95% CI: 19.2, 34.4, deff 1.99). Non-proliferative diabetic retinopathy (94.1%) was the most common form of retinopathy seen. Two eyes were blind (presenting vision <6/60) as a result of retinopathy.
Conclusion: Preventive strategies have to be evolved to ensure that blindness due to diabetic retinopathy does not become a public health problem in India. Further studies are required to understand the risk factors for retinopathy and vision loss in this population.
Keywords: diabetic retinopathy; population; prevalence; India
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