Cumulative Probability of Occurrence of Retinopathic in Type II Diabetes Using Survival Analysis in Zahedan City

Diabetes is a common disease that causes eye complications and leads to vision loss and blindness. Diabetic retinopathy is one of the main causes of blindness in the world and the most common cause of new cases of blindness. Predicting the occurrence time of this complication in diabetic people is one of the health priorities of society. The purpose of this study was to determine the cumulative probability of the occurrence of type II diabetes retinopathy using survival analysis in Zahedan City, Iran.

This was a historical cohort study using the survival analysis method, which was carried out descriptively and analytically on 410 patients in 2019. Data were calculated using SPSS22 software and descriptive tests, followed by the Kaplan-Meier method and the Cox proportional hazards model of survival.

The results of this study showed that 103 (25.13%) patients had retinopathy. The median survival time (months) of the occurrence of cardiac complications was related to marital status, fasting blood sugar, smoking, hemoglobin A1c, and blood lipids (P<0.05). The variables of fasting blood sugar, A1c, and two-hour blood glucose remained in the final model of the multiple Cox regression.

The findings of the current research showed that the prevalence of retinopathy in the studied population was relatively high and had a significant effect on reducing survival time. Therefore, it is necessary to make interventions in lifestyle changes, and regular control of blood pressure, cholesterol, and blood sugar to prevent the disease and reduce complications related to diabetes