Incidence Rate of Depression in Type 2 Diabetic Patients: 5-year Follow-Up Study
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Abstract
Introduction: Depression is one of the important comorbidities in patients with type 2 diabetes (T2DM). Therefore, screening and proper treatment can prevent its negative consequences. The objective of this retrospective cohort study was to identify the incidence rate of depression in T2DM patients. Materials and Method: Data were retrieved from electronic health records from one community hospital in Ubon Ratchathani province. Patients newly diagnosed with T2DM with ICD10 (E11) during January 1, 2007 and December 31, 2009 were included in this study and followed up for 5 years or when they were diagnosed with depression. Depression was identified by using ICD10 (F32-33) or receiving fluoxetine or sertraline at least for 3 months or presenting signs and symptoms of depression by depression screening tool from Department of Mental Health, Ministry of Public Health. Results: The results indicated that overall incidence rate of depression in T2DM patients was 14.83 per 1,000 person-years (95% CI = 12.25-17.96), 15.89 per person-years (95% CI = 12.53-20.16) among female and 13.21 per 1,000 person-years (95% CI = 9.57-18.23) among male. The incident rates of depression were 16.78 per 1,000 person-years (95% CI = 13.71-20.54), 6.38 per 1,000 person-years (95% CI = 3.19-12.76), and 13.46 per 1,000 person-years (95% CI = 4.34-41.75) in patients receiving oral antidiabetic agents only, insulin only, or combined therapy, respectively. Conclusion: Because the incidence rate of depression in T2DM patients is higher than in normal population, screening and early diagnosis of depression in T2DM patients should be implemented.
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