Effect of advanced access scheduling on processes and intermediate outcomes of diabetes care and utilization

J Gen Intern Med. 2009 Mar;24(3):327-33. doi: 10.1007/s11606-008-0888-2. Epub 2009 Jan 9.

Abstract

Background: The impact of open access (OA) scheduling on chronic disease care and outcomes has not been studied.

Objective: To assess the effect of OA implementation at 1 year on: (1) diabetes care processes (testing for A1c, LDL, and urine microalbumin), (2) intermediate outcomes of diabetes care (SBP, A1c, and LDL level), and (3) health-care utilization (ED visits, hospitalization, and outpatient visits).

Methods: We used a retrospective cohort study design to compare process and outcomes for 4,060 continuously enrolled adult patients with diabetes from six OA clinics and six control clinics. Using a generalized linear model framework, data were modeled with linear regression for continuous, logistic regression for dichotomous, and Poisson regression for utilization outcomes.

Results: Patients in the OA clinics were older, with a higher percentage being African American (51% vs 34%) and on insulin. In multivariate analyses, for A1c testing, the odds ratio for African-American patients in OA clinics was 0.47 (CI: 0.29-0.77), compared to non-African Americans [OR 0.27 (CI: 0.21-0.36)]. For urine microablumin, the odds ratio for non-African Americans in OA clinics was 0.37 (CI: 0.17-0.81). At 1 year, in adjusted analyses, patients in OA clinics had significantly higher SBP (mean 6.4 mmHg, 95% CI 5.4 - 7.5). There were no differences by clinic type in any of the three health-care utilization outcomes.

Conclusion: OA scheduling was associated with worse processes of care and SBP at 1 year. OA clinic scheduling should be examined more critically in larger systems of care, multiple health-care settings, and/or in a randomized controlled trial.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Adult
  • Aged
  • Ambulatory Care Facilities
  • Appointments and Schedules*
  • Cholesterol, LDL / blood
  • Cohort Studies
  • Diabetes Mellitus, Type 2 / therapy*
  • Female
  • Glycated Hemoglobin A / analysis
  • Humans
  • Hypertension / therapy
  • Male
  • Managed Care Programs
  • Middle Aged
  • Odds Ratio
  • Patient Acceptance of Health Care*
  • Patient Compliance*
  • Retrospective Studies

Substances

  • Cholesterol, LDL
  • Glycated Hemoglobin A