Plasma concentrations (n = 20) | AC concentrations (n = 20) | ELF concentrations (n = 20) | All concentrations (n = 60) | |
---|---|---|---|---|

Measures of bias | ||||

ME (mg/L) | −0.316 | −0.732 | +0.153 | −0.298 |

MWE (mg/L) | −0.641 | −0.024 | +4.605 | +1.313 |

Measures of precision | ||||

MSE (mg^{2}/L^{2}) | 0.614 | 12.982 | 0.139 | 4.579 |

MWSE (mg^{2}/L^{2}) | 2.647 | 1.873 | 77.975 | 27.498 |

Regression equation | y = 1.08x + 0.063 | y = 1.08x−0.136 | y = 1.04x−0.178 | y = 1.09x-0.102 |

R^{2} | 0.79 | 0.96 | 0.87 | 0.96 |

Abbreviations: ME = mean error, MWE = mean weighted error, MSE = Mean squared error, MWSE = mean weighted squared error.