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The Diabetes Educator, Vol. 29, No. 3,
488-501 (2003)
DOI: 10.1177/014572170302900313
© 2003 American Association of Diabetes Educators; Published by SAGE Publications
Meta-Analysis of Randomized Educational and Behavioral Interventions in Type 2 Diabetes
Tiffany L. Gary, PhD
Departments of Epidemiology, Loyola College, Baltimore, Maryland.
Jeanine M. Genkinger, MHS
Departments of Epidemiology, Loyola College, Baltimore, Maryland.
Eliseo Guallar, MD, DrPH
Departments of Epidemiology, Loyola College, Baltimore, Maryland.
Mark Peyrot, PhD
Departments of Medicine; The Johns Hopkins University, Baltimore, Maryland; Department of Sociology, Loyola College, Baltimore, Maryland.
Frederick L. Brancati, MD,MHS
Departments of Epidemiology and Medicine, Loyola College, Baltimore, Maryland.
PURPOSE
this meta-analysis was conducted to assess the effect of educational and behavioral interventions on body weight and glycemic control in type 2 diabetes.
MEHODS
Studies selected for analysis were published randomized controlled trials that evaluated educational and behavioral interventions (no drug interventions) in type 2 diabetes (sample size 210). These criteria were applied to searches of electronic databases and relevant bibliographies. Data were independently abstracted by 2 reviewers and adjudicated by consensus.
RESULTS
Of the 63 articles that met the inclusion criteria, 18 provided enough information for pooled estimates of glycohemoglobin (total Ghb, HbA1, or HbA1 C). These 18 studies yielded 2720 participants (sample sizes of 18 to 749). Interventions ranged from 1 to 19 months; follow-up ranged from 1 to 26 months. Glycohemoglobin was reduced by a mean of 0.43%. When results were stratified by quality score, glycohemoglobin was -0.50% and -0.38% for studies with high and low quality scores, respectively. When weighting studies by sample size, fasting blood glucose was reduced by 24 mg/dL and weight by 3 lbs.
CONCLUSIONS
Previous educational and behavioral interventions in type 2 diabetes have produced modest improvements in glycemic control. Future research should refine such interventions and improve methodology.
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