Inpatient screening for albuminuria and retinopathy to predict long-term mortality in type 2 diabetic patients: A retrospective cohort study

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Abstract

Background: There is a high hospitalization rate for diabetic patients. Since retinopathy and albuminuria are both important manifestations of microvascular disease in diabetes, our aim was to investigate the effect of retinopathy and albuminuria on long-term mortality in type 2 diabetic inpatients through this observational cohort study. Methods: Type 2 diabetic inpatients given a primary diagnosis of poor glucose control were consecutively enrolled during their hospitalization periods. Clinical information was collected through review of each patient's medical records, and mortality data were obtained from the national registry in Taiwan. Results: A total of 761 type 2 diabetic inpatients were enrolled in the study with a median follow-up period of 6.6 years (interquartile range, 4.0-9.6 years). Patients in the Albuminuria(-)/Retinopathy(+), Albuminuria(+)/Retinopathy(-) and Albuminuria(+)/Retinopathy(+) groups had significantly higher risks of all-cause mortality and cardiovascular mortality than those in the Albuminuria(-)/Retinopathy(-) group. However, among patients with albuminuria, there was no significant difference in cumulative mortality between those with and without retinopathy (P = 0.821). A decrease in the estimated glomerular filtration rate (eGFR), but not retinopathy, was an independent predictor of all-cause mortality (95% CI 0.647-0.893; P < 0.001) and cardiovascular mortality (95% CI 0.564-0.921; P = 0.009) in type 2 diabetic inpatients with albuminuria. Conclusions: Albuminuria in type 2 diabetic inpatients is a strong predictor of long-term mortality after discharge from the hospital. Retinopathy is an independent predictor of mortality in type 2 diabetic inpatients without albuminuria but not in those with albuminuria. A low eGFR is a better predictor of mortality than retinopathy in type 2 diabetic inpatients with albuminuria.

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Hsieh, Y. M., Lee, W. J., Sheu, W. H. H., Li, Y. H., Lin, S. Y., & Lee, I. T. (2017). Inpatient screening for albuminuria and retinopathy to predict long-term mortality in type 2 diabetic patients: A retrospective cohort study. Diabetology and Metabolic Syndrome, 9(1). https://doi.org/10.1186/s13098-017-0229-x

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