Fig. 2. PBIAS trendlines of AST for the Ci16000, two Vista, and Vitros instruments. Blue lines are converted PBIAS trendlines, and red lines are original (unconverted) PBIAS trendlines. Calibrator changes are indicated with a green arrow, and conversion factor changes are indicated with a red arrow. Reagent changes from without P5P to with P5P are indicated with a yellow arrow. RCPA acceptance criteria for AST comparability total error is under 12%, as depicted by the two purple dotted lines [15].
Abbreviations: AST, aspartate transaminase; PBIAS, percent bias; RCPA, Royal College of Pathologists of Australasia.

Ann Lab Med 2022;42:150~159 https://doi.org/10.3343/alm.2022.42.2.150