The value of self-monitoring of blood glucose: a review of recent evidence

AimsTo review the recent literature relating to the role of self-monitoring of blood glucose (SMBG) and glycemic control.MethodsMedline and EMBASE databases were searched between 1996 and June 2008 using terms that included diabetes mellitus, self-care, and blood glucose self monitoring. Both experimental and nonexperimental studies with HbA1c as an outcome measure were included. A meta-analysis was performed on randomized controlled trials (RCTs) in type 2 diabetes which met the inclusion criteria.ResultsFrom 1102 relevant papers, 34 original containing 38 separate studies were identified as being published between 2000 and June 2008. There were 23 studies of type 2 diabetes and, of these, 13 were nonexperimental and 10 experimental, including six RCTs. The results of five of these RCTs in non–insulin-treated type 2 diabetic patients were combined in a meta-analysis with two earlier RCTs which yielded a significant pooled SMBG-related decrease in HbA1c of −0.22 (95% CI −0.34% to −0.11%).ConclusionsThe present meta-analysis showed an SMBG-related HbA1c reduction in non–insulin-treated type 2 diabetes patients that was similar to that in previous systematic reviews but in a substantially larger patient sample. This finding is consistent with most observational studies of similarly treated patients.