The Prevalence of Diabetic Retinopathy and Associated Risk Factors among Diabetic Patients in a Tertiary Care Hospital

Background: One of the most serious complications of diabetes that places an enormous strain on the patient, the healthcare system, and the world economy is diabetic retinopathy (DR). It includes long-term exposure to the metabolic changes linked to diabetes, which cause damage to the retina's microvasculature. Objectives: The aim of the study was to assess the prevalence of diabetic retinopathy and associated risk factors among diabetic patients in a tertiary care hospital. Methods: This cross-section observational study was carried out in the Department of Ophthalmology, North Bengal medical College. Convenience sampling technique was followed. Face to face interview was done to collect data with a semi-structured questionnaire. After collection, the data were checked and cleaned, followed by editing, compiling, coding and categorizing according to the objectives and variable to detect errors and to maintain consistency, relevancy and quality control. Statistical evaluation of the results used to be obtained via the use of a window-based computer software program devised with Statistical Packages for Social Sciences (SPSS-24). The duration of the period from July 2018 to July 2022. A total of 120 patients were participate in the study. Results: About 58.33% respondents were male and 41.67% were female. Majority (33.33%) of the respondents were within the age group of 50-59. 33.33% were service holder, 41.67% were businessman, 12.5 were day labor, 6.67% were farmer. 75% were from urban area and 25% from rural area. The prevalence of DR in this study was 41.1%. About 90% had DM of <5 years, 55% had 6-10 years, 40% had 15-20 Years, 30% had 16-20 years and only 7% had >21 years. About 50% had normal grade of diabetic retinopathy in the worse eye, 15% had Mild NPDR, 8.33% had Moderate NPDR, 6.67% had Mild to moderate NPDR with non-CSME, 2.5% Moderate NPDR with CSME, Severe NPDR with non-CSME Severe NPDR with CSME and Advanced PDR respectively. Mean FBS (mg/dl) was 160.86±70.6, Total cholesterol (mg/dl) was 183.2 ± 2.1, Triglycerides (mg/dl) was 161.2 ± 2.6, Systolic BP was 130.56±15.7 and Diastolic BP was 80.86±13.4. Patients with baseline age of <60 years were three times (AOR = 3.2:95% CI: 1.19–8.63) more likely to develop DR. The odds of DR is about 3 times (AOR = 2.91:95% CI: 1.01–8.35) higher for patients with disease duration of ≥6 years as compared to disease duration of <6 years. Systolic blood pressure also had statistically significant association with patients having blood pressure of <140 mmHg being about 3.6 times (AOR = 0.28:95% CI: 0.09–0.82) less likely to have DR as compared to hypertensive patients with systolic blood pressure of ≥140 mmHg. The other cofactors, history of hypertension, and total cholesterol level were not independent significant factors for the development of DR in our study. Conclusion: Systolic hypertension, being on insulin alone or in combination with OHA, and having diabetes for a longer period of time were all independently linked to the occurrence of DR. The significant DR prevalence our study suggests that routine patient care, including treatment facilities, has to be improved. Healthcare practitioners must make a consistent effort to educate diabetic patients about the importance of blood sugar control and hypertension management in lowering the risk of the start and progression of DR. It is advised that diabetic patients get health education regarding the importance of routine eye exams for the early detection and treatment of diabetes-related eye problems.