Presentation on theme: "Relationship Between the Chronic Care Model and Diabetes Outcomes Laurie Hurowitz, PhD, Benjamin Littenberg, MD, and Charles D. MacLean, MDCM General Internal."— Presentation transcript:
Relationship Between the Chronic Care Model and Diabetes Outcomes Laurie Hurowitz, PhD, Benjamin Littenberg, MD, and Charles D. MacLean, MDCM General Internal Medicine, College of Medicine AcademyHealth, Boston, MA, June 28, 2005
Context: Chronic Illness Care Current health care services are designed to deliver acute care Need to redesign health care to deliver: –more effective preventive services –more effective services to those with one or more chronic illnesses
Informed, Activated Patient Prepared, Proactive Practice Team Productive Interactions Functional and Clinical Outcomes Delivery System Design Clinical Information Systems Decision Support Self-Management Support Community Resources & Policies The Chronic Care Model (CCM) Health System Organization of Care
Current Research CCM & Outcomes Most research has focused on elements of the CCM and outcomes, and not the model as a whole. Clinical Tool: Assessment of Chronic Illness Care – pre/post measure, sensitive to organizational change.
Research Question What is the relationship between primary care practice organization across all components of the Chronic Care Model and glycemic control for patients with diabetes?
Methods Design - Cross-sectional, observational study Subjects - Adults diagnosed with diabetes in care in primary care practices in a rural VT, NH, and NY. 2 measures
Predictor Measure The Assessment of Diabetes Care, adapted from the Assessment of Chronic Illness Care version 3.5 (organizational change - organizational status) 33 prompts/stems 12-point response scale – descriptors provided Subscale scores (0-11); overall score is average (0-11) Practice average – average across all practitioners Higher scores are associated with greater conformance with the CCM.
Overall Goals for Diabetes Care (circle one) : Do not exist. Exist but are not Are measurable Are measurable, reviewed actively reviewed. and reviewed. routinely, and incorporated into plans for improvement. Sample Item Subscale: Overall System of Health Care
Glycosylated hemoglobin, as measured by the A1C assay (A1C) Source: adult patients diagnosed with diabetes Practice average - baseline measure from the Vermont Diabetes Information System (VDIS) For patients with diabetes, lower A1Cs are associated with better clinical outcomes. Even small decreases are related to improving the burden of diabetes. Outcome Measure
Results Practice CharacteristicsN=30 # of Practices w/ one PCP completing ADC (% VDIS)* 30 (48%) # of PCPs completing the ADC Survey (% of total in VDIS)* 50 (40%) Number of PCPs/Practice Completing Survey 1 to 5 Average Number of Patients with Diabetes/Practice (range) 98 (12-275) Average ADC Score (range)4.6 basic (2.7 limited to 6.9 reasonably good ) *At baseline, VDIS had 62 practices with 124 PCPs.
Patient Characteristics*(n=3,819) Average Patient Age (yrs) (range among practices) 61.2 (52-73) % Male51 Average A1C (mean practice range)7.2 ( ) *This subset is 62% of the 6,124 patients participating in VDIS at baseline. This subset did not differ significantly from the group as a whole, by age or by gender. Results (continued)
Conformance with the CCM & Diabetes Outcomes Practice Detail (N=30; n=3,819)
Conformance with the CCM & Diabetes Outcomes Linear Regression ( N=30; n=3,819) Regression results - Adjusting for age, the relationship between the average ADC score and glycemic control had a regression coefficient of (p=0.029; 95% CI to -0.01).
Conclusions Patients who receive care in practices that conform to the Chronic Care Model have better glycemic control. This study lends support to the overall validity of the Chronic Care Model and its relationship to better outcomes for patients with diabetes.
References Bodenheimer T, Wagner EH, Grumbach K. Improving primary care for patients with chronic illness. JAMA 2002, Oct 9; 288(14): and Part 2. JAMA 2992 Oct 16:288(15): Bonomi AE, Wagner EH, Glasgow R, Vonkroff M. Assessment of chronic illness care: a practical tool for quality improvement. Health Services Research. 2002; 37(3): MacLean CD, Littenberg B, Gagnon M, Reardon M, Turner PD and Jordan C. The Vermont Diabetes Information System (VDIS): study design and subject recruitment for a cluster randomized trial of a decision support system in a regional sample of primary care practices. Clinical Trials. 2004;1: Shojania KG, Ranji SR, Shaw LK, Charo LN, Lai JC, Rushakoff RJ, McDonald KM, Owens DK. Diabetes mellitus care. Closing the quality gap: a critical analysis of quality improvement strategies, Vol 2. Technical review 9, AHRQ Pub no Rockville, MD. Sept The Chronic Care Model and Clinical Tools. The Diabetes Control and Complications Trial Research Group. The effect of intensive treatment of diabetes on the development and progression of long-term complications in insulin-dependent diabetes mellitus. N Engl J Med. 1993;329: Wagner EH, Glasgow RE, Davis C, Bonomi AE, Provost L, McCulloch D, Carver P, Sixta C. Quality improvement in chronic illness care: a collaborative approach. Jt Comm J Qual Improv 2001 Feb; 27(2):63-80.
How to Contact Us & Study Support For further information, please contact: This study was supported by the National Institute of Diabetes and Digestive and Kidney Disease (K24DK and R01DK61167)