Nurse-led Case Management for Diabetes and Cardiovascular Disease Patients With Depression

Randomized Trial of Liaison Psychiatry in Primary Care

This study will evaluate the effectiveness of a nurse-led case management intervention in improving disease control and depression symptoms in adults with diabetes and/or heart disease who are also depressed.

Study Overview

• Status: Completed
• Conditions: Depression
• Intervention / Treatment: Behavioral: Treatment as usual; Behavioral: Nurse-led case management

Detailed Description

Depression is a serious medical illness that has been associated with increased risk for heart disease and diabetes. Depression may negatively impact aspects of self-care that are required to effectively manage such long-term diseases. In depressed people who have heart disease and/or diabetes, treatment for depression appears to result in only limited improvements in depression symptoms and no improvements in heart disease and diabetes symptoms. An integrated treatment approach may be more effective in improving all three conditions. This study will evaluate the effectiveness of a nurse-led case management intervention in improving disease control and depression symptoms in adults with diabetes and/or heart disease who are also depressed.

Participants in this single-blind study will be randomly assigned to take part in the case management intervention or receive usual care. All participants will attend 5 in-person study evaluation visits and receive 4 follow-up phone calls over 24 months. At each of the study visits, measurements of height, weight, waist size, and blood pressure will be taken. At study evaluations, blood and urine samples will also be taken. Participants will be asked not to eat for 8 hours before providing blood samples at 3 of the visits. During follow-up phone calls participants will answer various questions.

The case management intervention will entail approximately 10 visits with a trained nurse at the clinic or by telephone. Participants in this group will receive educational materials about how to manage diabetes and/or heart disease and stress or depression. Nurses will also provide guidance and support in managing medications, phone calls to check participants' progress, and assistance in setting personal goals and in managing physical health problems and symptoms of depression or stress. Outcomes will be measured at Months 6, 12, 18, and 24 months.

• Study Type: Interventional
• Enrollment (Actual): 214
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • Washington
    • Seattle, Washington, United States, 98101
      • Group Health Cooperative

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 80 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Diagnosis of diabetes and/or heart disease
• Poor disease control (defined as an HbA1c level of at least 8.5%, blood pressure greater than 140/90 mm Hg, LDL cholesterol greater than 130 mg/dL)
• Diagnosis of major depressive disorder

Exclusion Criteria:

• History of psychosis
• At high risk for suicide
• Cognitive impairment
• Current alcohol or substance abuse disorder
• Does not own a telephone
• Currently seeking psychiatric care
• Pregnant or breastfeeding
• Currently enrolled in a Group Health Cooperative disease management program
• Terminal illness
• Plans to leave Group Health Cooperative in less than a year
• Does not speak English

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Single

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Active Comparator: B; Treatment as usual	Behavioral: Treatment as usual; Participants will attend 10 study visits and receive 4 follow-up phone calls over 24 months. During this time, participants will receive usual care.
Experimental: A; Case management intervention	Behavioral: Nurse-led case management; The case management intervention will entail approximately 10 visits with a trained nurse at the clinic or by telephone. Participants in this group will receive educational materials about how to manage diabetes and/or heart disease and stress or depression. Nurses will also provide guidance and support in managing medications, phone calls to check participants' progress, and assistance in setting personal goals and in managing physical health problems and symptoms of depression or stress.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Combined Effect of Intervention on SCL-20, Systolic Blood Pressure, LDL and HbA1c	A scaled marginal model approach was used to jointly describe the four 12 month outcomes (SCL-20, HbA1c, systolic BP, LDL: all data submitted as Outcome Measures #2-5 below) and allowed use to test for a primary effect of the intervention among outcomes, scaling each outcome by its standard error, so the intervention effects could be interpreted as effect sizes.The model was estimated by iterating between estimation of the covariance associated with the outcomes and generalized-estimating equation estimation of scaled outcomes. Effect size is estimated as Cohen d effect size that was use for the depression outcome is the difference in change from baseline to 12 months in the intervention and usual care groups divided by the pooled base line standard deviation. Thus, a d of 0.25 indicates that one-quarter of a standard deviation separates the two means. Cohen has suggested that an effect size of 0.20 would be considered small, 0.50 medium and 0.80 large.	Baseline to 12 months
Symptom Checklist-20 Score at Baseline, 6 Months and 12 Months	SCL-20 is a 20 question checklist in which items are averaged to yield a potential score of 0 to 4 with higher scores indicating more severe depression symptoms. For the Primary Outcome (Outcome Measure #1 above), a scaled marginal model approach was used to jointly describe the four 12 month outcomes (SCL-20, HbA1c, systolic BP, LDL) and allowed use to test for a primary effect of the intervention among outcomes, scaling each outcome by its standard error, so the intervention effects could be interpreted as effect sizes.	Measured at Baseline, 6 Months, 12 months
Systolic Blood Pressure at Baseline, 6 Months and 12 Months	Systolic Blood Pressure was measured at Baseline, 6 months and 12 months For the Primary Outcome (Outcome Measure #1 above), a scaled marginal model approach was used to jointly describe the four 12 month outcomes (SCL-20, HbA1c, systolic BP, LDL) and allowed use to test for a primary effect of the intervention among outcomes, scaling each outcome by its standard error, so the intervention effects could be interpreted as effect sizes.	Measured at Baseline, 6 Months, 12 months
LDL Cholesterol at Baseline and 12 Months	LDL Cholesterol was measured at Baseline and 12 months For the Primary Outcome (Outcome Measure #1 above), a scaled marginal model approach was used to jointly describe the four 12 month outcomes (SCL-20, HbA1c, systolic BP, LDL) and allowed use to test for a primary effect of the intervention among outcomes, scaling each outcome by its standard error, so the intervention effects could be interpreted as effect sizes.	Measured at Baseline and 12 months
Glycated Hemoglobin (HbA1c) at Baseline, 6 Months and 12 Months	Glycated hemoglobin (HbA1c) was measured at Baseline, 6 months and 12 months For the Primary Outcome (Outcome Measure #1 above), a scaled marginal model approach was used to jointly describe the four 12 month outcomes (SCL-20, HbA1c, systolic BP, LDL) and allowed use to test for a primary effect of the intervention among outcomes, scaling each outcome by its standard error, so the intervention effects could be interpreted as effect sizes.	Measured at Baseline, 6 months and 12 months

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Functional Impairment	Disability was measured by the Sheehan Disability scale which measures the extent to which health interferes with social, vocational and familial functioning each on a 0 to 10 Likert scale where 0 is "not at all" and 10 is "extremely". This scale consists of 3 items which are averaged together to create the average disability score, which ranges from 0 to 10.	Measured at Months 6, 12 months
Health Care Costs	Mean total outpatient costs for 2 years post baseline adjusted for age, gender and previous 12 months of outpatient costs	Cumulative outpatient costs over 24 months

Collaborators and Investigators

• Sponsor: University of Washington
• Collaborators: National Institute of Mental Health (NIMH)
• Investigators: Principal Investigator: Wayne J. Katon, MD, University of Washington

Publications and helpful links

General Publications

• Katon WJ, Lin EH, Von Korff M, Ciechanowski P, Ludman EJ, Young B, Peterson D, Rutter CM, McGregor M, McCulloch D. Collaborative care for patients with depression and chronic illnesses. N Engl J Med. 2010 Dec 30;363(27):2611-20. doi: 10.1056/NEJMoa1003955.
• Lin EH, Von Korff M, Ciechanowski P, Peterson D, Ludman EJ, Rutter CM, Oliver M, Young BA, Gensichen J, McGregor M, McCulloch DK, Wagner EH, Katon WJ. Treatment adjustment and medication adherence for complex patients with diabetes, heart disease, and depression: a randomized controlled trial. Ann Fam Med. 2012 Jan-Feb;10(1):6-14. doi: 10.1370/afm.1343.
• Von Korff M, Katon WJ, Lin EH, Ciechanowski P, Peterson D, Ludman EJ, Young B, Rutter CM. Functional outcomes of multi-condition collaborative care and successful ageing: results of randomised trial. BMJ. 2011 Nov 10;343:d6612. doi: 10.1136/bmj.d6612.
• Katon W, Russo J, Lin EH, Schmittdiel J, Ciechanowski P, Ludman E, Peterson D, Young B, Von Korff M. Cost-effectiveness of a multicondition collaborative care intervention: a randomized controlled trial. Arch Gen Psychiatry. 2012 May;69(5):506-14. doi: 10.1001/archgenpsychiatry.2011.1548.
• Ludman EJ, Peterson D, Katon WJ, Lin EH, Von Korff M, Ciechanowski P, Young B, Gensichen J. Improving confidence for self care in patients with depression and chronic illnesses. Behav Med. 2013;39(1):1-6. doi: 10.1080/08964289.2012.708682.

Helpful Links

• Related Info

Study record dates

Study Major Dates

• Study Start: May 1, 2007
• Primary Completion (Actual): October 1, 2010
• Study Completion (Actual): August 1, 2012

Study Registration Dates

• First Submitted: May 1, 2007
• First Submitted That Met QC Criteria: May 1, 2007
• First Posted (Estimate): May 3, 2007

Study Record Updates

• Last Update Posted (Estimate): May 2, 2014
• Last Update Submitted That Met QC Criteria: May 1, 2014
• Last Verified: May 1, 2014

More Information

Terms related to this study

• Keywords: Diabetes; Heart Disease; major Depressive Disorder
• Additional Relevant MeSH Terms: Behavioral Symptoms; Mental Disorders; Mood Disorders; Depression; Depressive Disorder
• Other Study ID Numbers: R01MH041739 (U.S. NIH Grant/Contract); DSIR 82-SEPC