A new consensus error grid to evaluate the clinical significance of inaccuracies in the measurement of blood glucose

Diabetes Care. 2000 Aug;23(8):1143-8. doi: 10.2337/diacare.23.8.1143.


Objective: The objectives of this study were 1) to construct new error grids (EGs) for blood glucose (BG) self-monitoring by using the expertise of a large panel of clinicians and 2) to use the new EGs to evaluate the accuracy of BG measurements made by patients.

Research design and methods: To construct new EGs for type 1 and type 2 diabetic patients, a total of 100 experts of diabetes were asked to assign any error in BG measurement to 1 of 5 risk categories. We used these EGs to evaluate the accuracy of self-monitoring of blood glucose (SMBG) levels in 152 diabetic patients. The SMBG data were used to compare the new type 1 diabetes EG with a traditional EG.

Results: Both the type 1 and type 2 diabetes EGs divide the risk plane into 8 concentric zones with no discontinuities. The new EGs are similar to each other, but they differ from the traditional EG in several significant ways. When used to evaluate a data set of measurements made by a sample of patients experienced in SMBG, the new type 1 diabetes EG rated 98.6% of their measurements as clinically acceptable, compared with 95% for the traditional EG.

Conclusions: The consensus EGs furnish a new tool for evaluating errors in the measurement of BG for patients with type 1 and type 2 diabetes.

Publication types

  • Clinical Trial
  • Comparative Study

MeSH terms

  • Adult
  • Blood Glucose / analysis*
  • Blood Glucose Self-Monitoring / instrumentation
  • Blood Glucose Self-Monitoring / methods
  • Blood Glucose Self-Monitoring / standards*
  • Diabetes Mellitus, Type 1 / blood*
  • Diabetes Mellitus, Type 2 / blood*
  • Female
  • Humans
  • Male
  • Physicians*
  • Regression Analysis
  • Reproducibility of Results
  • Software
  • United States


  • Blood Glucose