BMJ, doi: 10.1136/bmj.39247.447431.BE, (Published 25 June 2007)

research-article

Impact of self monitoring of blood glucose in the management of patients with non-insulin treated diabetes: open parallel group randomised trial

¹ Department of Primary Health Care, University of Oxford, Oxford OX2 7LF, ² Johns Hopkins University School of Medicine, Baltimore, ³ School of Health and Related Research, University of Sheffield, ⁴ Applied Research Centre in Health and Lifestyle Interventions, University of Coventry, ⁵ Diabetes Trials Unit, University of Oxford, ⁶ Institute of Public Health, University of Cambridge, ⁷ Division of Public Health and Primary Care, University of Oxford

Objective To determine whether self monitoring, alone or with instruction in incorporating the results into self care, is more effective than usual care in improving glycaemic control in non-insulin treated patients with type 2 diabetes.

Design Three arm, open, parallel group randomised trial.

Setting 48 general practices in Oxfordshire and South Yorkshire.

Participants 453 patients with non-insulin treated type 2 diabetes (mean age 65.7 years) for a median duration of three years and a mean haemoglobin A_1c level of 7.5%.

Interventions Standardised usual care with measurements of HbA_1c every three months as the control group (n=152), blood glucose self monitoring with advice for patients to contact their doctor for interpretation of results, in addition to usual care (n=150), and blood glucose self monitoring with additional training of patients in interpretation and application of the results to enhance motivation and maintain adherence to a healthy lifestyle (n=151).

Main outcome measure HbA_1c level measured at 12 months.

Results At 12 months the differences in HbA_1c level between the three groups (adjusted for baseline HbA_1c level) were not statistically significant (P=0.12). The difference in unadjusted mean change in HbA_1c level from baseline to 12 months between the control and less intensive self monitoring groups was –0.14% (95% confidence interval –0.35% to 0.07%) and between the control and more intensive self monitoring groups was –0.17% (–0.37% to 0.03%).

Conclusions Evidence is not convincing of an effect of self monitoring blood glucose, with or without instruction in incorporating findings into self care, in improving glycaemic control compared with usual care in reasonably well controlled non-insulin treated patients with type 2 diabetes.

Trial registration Current Controlled Trials ISRCTN47464659 [controlled-trials.com] .

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Rapid Responses:

Read all Rapid Responses

Self monitoring of blood glucose: analytical and clinical issues should not be overlooked.

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plasma reading capillary glucose meters

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Looks like an excuse

M Elting
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