Depression Screening in Diabetes Care to Improve Outcomes: Are We Meeting the Challenge?

PURPOSE: Evidence-based guidelines recommend regular depression screening among individuals with type 2 diabetes mellitus (T2DM). The purpose of this study is to examine depression screening patterns among a primary care population with T2DM, through use of the Patient Health Questionnaire-9 (PHQ-9). METHODS: In total, 1817 patients with T2DM were analyzed through a retrospective observational study at 2 sites, a regional health center and a federally qualified health center (FQHC). The T2DM sample was divided into those with and without a major depressive disorder (MDD) diagnosis. Depression screening rates and depression severity were assessed through the PHQ-9. RESULTS: Both sites had higher rates of PHQ-9 screening among individuals with a history of MDD (64.82%) vs those without MDD (11.39%). Individuals from the FQHC without a history of depression had a higher mean PHQ-9 score (10.11) than those with a previous MDD diagnosis at both RHS and FQHC (7.16 and 9.85, respectively). CONCLUSIONS: Depression screening rates among individuals with diabetes and no history of MDD were remarkably low. Patients with diabetes but no MDD diagnosis who sought health care at a FQHC clinic had more depressive symptoms than those with a history of MDD at both sites. Individuals with diabetes and who have a MDD diagnosis are much more likely to receive regular depression screening than those without MDD, which leaves a substantial proportion of patients with undetected depression. Depression screening must be enhanced for all individuals with diabetes, particularly for low-income individuals and those without a previous diagnosis of MDD.

Disease Control Among Patients With Diabetes and Severe Depressive Symptoms.

OBJECTIVE: Major depressive disorder and type 2 diabetes commonly co-occur and disease control tends to be poorer when both conditions are present. However, little research has examined the disease characteristics of patients with diabetes and more severe depressive symptoms. METHODS: We report a retrospective observational study of 517 patients with diabetes from 2 primary care centers. Patients with diabetes and moderately-severe/severe depression symptoms (Patient Health Questionnaire [PHQ-9] score >15) were compared with patients with diabetes without moderate or severe depression symptoms (PHQ-9 score <15; the comparison group) with regard to control of diabetes, blood pressure, and lipid parameters. Frequency of HbA1c and PHQ-9 testing were also examined. RESULTS: Patients with diabetes and moderately severe/severe depressive symptoms had higher HbA1c (7.56% vs. 7.09%), diastolic blood pressure (78.43 vs. 75.67 mm Hg), and low-density lipoprotein cholesterol (109.12 vs. 94.22 mg/dL) versus the comparison group. Patients with diabetes and moderately-severe/severe depression underwent HbA1c and PHQ-9 testing with similar frequency to the comparison group. CONCLUSIONS: The presence of moderately severe/severe depressive symptoms was associated with poorer glucose, lipid, and blood pressure control among patients with diabetes. Further research should prospectively examine whether a targeted depression treatment goal (PHQ-9 score <15) in patients with diabetes results in improved control of these important disease parameters.

Use of the 9-Item Patient Health Questionnaire for Depression Assessment in Primary Care Patients With Type 2 Diabetes.

The purpose of the current study was to assess the frequency and distribution of the 9-Item Patient Health Questionnaire (PHQ-9) among individuals with type 2 diabetes with and without depression. The current case-control study used electronic medical record data from two primary care institutions. The sample was divided into cases with coexisting depression and type 2 diabetes and controls without depression. Data included demographics, biomarkers, number of services delivered, and clinic visits in 2013. Similar PHQ-9 use was seen between unique primary care practices. However, less than one third of patients at either site received depression screening with the PHQ-9 in 2013. Male and older adult patients were less likely to receive assessment. Guideline ambiguity and lack of accountability in primary care practice has made the use of depression metrics arbitrary in diabetic populations at risk for depression. To assure adequate care provision, it is imperative that proven tools for assessing depressive symptoms are used.