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The Diabetes Educator, Vol. 33, No. 6, 991-1010 (2007)
DOI: 10.1177/0145721707309807
© 2007 American Association of Diabetes Educators; Published by SAGE Publications

FEATURES

Does Patient Blood Glucose Monitoring Improve Diabetes Control?

A Systematic Review of the Literature

Lisa McAndrew, MS, Stephen H. Schneider, MD, Edith Burns, MD and Howard Leventhal, PhD

From Rutgers University, Department of Psychology, Institute for Health & Behavior, New Brunswick, New Jersey (Ms McAndrew, Dr Leventhal); Robert Wood Johnson Medical School, Division of Endocrinology, Diabetes, Metabolism, New Brunswick, New Jersey (Dr Schneider); and Department of Medicine, Medical College of Wisconsin, Milwaukee (Dr Burns). This article was funded through funds from the National Institute of Health, grant R24 AG023958, Center for the Study of Health Beliefs and Behaviors.

Correspondence to Howard Leventhal, PhD, Rutgers University, Department of Psychology, Institute for Health & Behavior, 30 College Ave, New Brunswick, NJ 08901; e-mail: Hleventhal{at}ifh.rutgers.edu.

Objective

The purpose of this systematic review was 2-fold: first, to perform a comprehensive review of relevant studies on the impact of self-monitoring of blood glucose (SMBG) on HbA1c levels for patients with type 2 diabetes mellitus and, second, to explore mediators and moderators within a self-regulation framework.

Data Sources

Five databases—Medline, PsychInfo, Cochrane Database of Systematic Reviews, Cochrane Central Register of Controlled Trials, and Cumulative Index to Nursing & Allied Health Literature (CINAHL)—were searched.

Study Selection

Cross-sectional, longitudinal, and randomized control trials from 1990 to 2006, which included patients with type 2 diabetes not on insulin, were reviewed. In total, 6769 studies were screened for inclusion, 89 were retrieved for detailed analysis, and 29 met criteria for inclusion in the review.

Data Extraction

Data on the impact of SMBG on HbA1c, potential mediators and moderators, study design and participants, and limitations of each study were retrieved.

Data Synthesis

Twenty-nine studies were included in this review: 9 cross-sectional studies, 9 longitudinal studies, and 11 randomized controlled trials. Evidence from the cross-sectional and longitudinal studies was inconclusive. Evidence from randomized controlled trials suggests that SMBG may lead to improvements in glucose control. Very few studies examined potential mediators or moderators of SMBG on HbA1c levels.

Conclusions

SMBG may be effective in controlling blood glucose for patients with type 2 diabetes. There is a need for studies that implement all the components of the process for self-regulation of SMBG to assess whether patient use of SMBG will improve HbA1c levels.


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Addendum

The Diabetes Educator 2007 33: 1010-1011. [Full Text]