Accuracy and Precision of Blood Glucose Level Examination Using the POCT Method on a New Device with an Old Device Agains the GOD-PAP Method

Abstract

Blood glucose testing using the POCT method is currently often used because it uses capillary blood samples with a small volume. Quality control of POCT equipment is needed to see the accuracy value and precision value so that the feasibility of the method used is known. The accuracy value is a precise measurement in accordance with the correct value while the precision value is the accuracy of the examination results when replicated with the same sample. This study aims to determine the accuracy and precision of blood glucose testing using the POCT method on new devices and old devices against the GOD-PAP method. This study used analytic observational method with cross sectional approach. This research was conducted in the clinical chemistry laboratory of the Surabaya kemenkes polytechnic and the GOD-PAP examination at the Surabaya health laboratory. It was carried out on November, 2023-February, 2024. Using 30 test materials from Surabaya poltekkes kemenkes students. The results of the study obtained the accuracy value of the POCT method on the new device against the GOD-PAP method obtained an average percentage inaccuracy of 0.87%. While the POCT method on the old device obtained an average percentage of inaccuracy of -2.87%. The results of the precision value of blood glucose levels of the POCT method on the new device obtained an average KV of 3.71% and on the old POCT method obtained a KV of 8.52%. This conclusion is that the accuracy value of the POCT method on new device and old device is accurate because it is still in the range of 10%. While the precision value on the new device has high accuracy because it has an imprecision value that is lower than the maximum CV limit of blood glucose examination, which is 5%. The old device has lower precision because it has an imprecision value that is higher than the maximum CV limit of blood glucose examination.