Correlation Between Glugometer and Laboratory Method in Measuring Capillary and Venous Blood Glucose Levels in Type 2 Diabetic Patients

The aim of the study was to investigate the correlation between levels of blood glucose in samples taken from patients with type 2 diabetes mellitus measured by instrument for self-monitoring of blood glucose (glucometer) and by laboratory methods (photometric method or enzymatic colorimetric method).

One hundred patients with type 2 diabetes mellitus (T2DM) who were attending a privet medical laboratory during the period December 2017 to March 2018 were participated in the present study. Among the participants, 46 were female with an age range of 40–80 years and a age mean of 53.10± 10.61 years. The male patients were 54 with an age range of 40–79 years and a age mean of 51.17± 9.74 years. Venous and capillary blood glucose levels were determined by laboratory methods and glucometer for each participant.

The mean of photometric venous blood glucose (PVBG) was 163.88 ±107.06, Glucometric Venous Blood Glucose (GVBG) was 190.95 ±123.96 mg/dl, Photometric Capillary Blood Glucose (PCBG) was 171.53±116.52 mg/dl, and Glucometric Capillary Blood Glucose (GCBG) was 193.69±123.21 mg/dl. The obtained data was analyzed by Lin's concordance correlation coefficient. Concordance correlation coefficients (rc) were 0.94 for PVBG vs GVBG and 0.97 for PCBG vs GCBG.

The results obtained in this study showed that the values of blood glucose level determined by glucometer are close to the values determined by laboratory methods. Moreover, a positive correlation coefficient showed strong association between capillary and venous glucose measurements.