Albumin | HbA1c | Testosterone | Troponin I | Vitamin D3 | |
---|---|---|---|---|---|

Description | Many measurements per day; normal distribution of true values | Low sigma value; four QC measurements | Bimodal distribution of true values based on sex | Many measurements close to limit of detection | Seasonal variation of true values |

Measurements per day (SD) | 500 (50) | 70 (6) | Male: 50 (5) Female: 30 (4) | 120 (20) | 200 (20) |

Distribution of values | Normal; center^{b}: 3.474 spread: 0.886 (unit: g/dl) | Lognormal; center: 5.504 spread: 0.892 (unit: %) | Male: lognormal; center: 3.505 spread: 2.402 female: lognormal; center: 0.366 spread: 0.532 (unit: ng/mL) | Lognormal; center: 0.160 spread: 0.656 (unit: ng/mL) | Lognormal; center: 19.585 ± 7.5% seasonal variation; spread: 11.382 (unit: ng/mL) |

Allowable total error [on interval] | 12.5% [2–7] | 10% [4.89– 14.96] | 20.5% [0.2– 20] | 20% [0.1–35] | 25% [5–50] |

Precision | |||||

α^{c} | 0.067 | 0.1 | 0.008 | 0.003 | 0.5 |

ß^{d} | 0.031 | 0.029 | 0.034 | 0.033 | 0.05 |

Quality controls | |||||

QC_1 | 3 | 5 | 3 | 0.05 | 10 |

QC_2 | 6 | 6 | 8 | 0.95 | 30 |

QC_3 | 8 | ||||

QC_4 | 10 |

↵a α and ß are parameters of the characteristic function.

↵b Center and spread denote mean and standard deviation for normal distribution.

↵c α expresses constant imprecision at low concentration.

↵d ß expresses relative imprecision similar to the coefficient of variation. For lognormal distribution, respective values are also provided on a non-logarithmized scale for better comparability.