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Table 5 Repeatability, reproducibility, and intra, inter-laboratory coefficient of variation for 3-HPMA between the four participating laboratories

From: An inter-laboratory comparison of urinary 3-hydroxypropylmercapturic acid measurement demonstrates good reproducibility between laboratories

Samples Mean 3-HPMA (ng/ml) a r b R c CoV within (%) d CoV between (%) e
1 34 5.8 13.9 6.1 NAf
2 428 50 100.8 4.2 8.4
3 1201 142.7 261.8 4.2 7.8
4 3528 268.4 460.3 2.7 4.7
5 45 7.6 24.2 5.9 NAf
6 330 54.9 138 6 15
7 755 143.3 363.4 6.8 17.2
8 1021 89.1 346.4 3.1 12.1
9 1235 223.1 710.1 6.5 20.5
  1. aMean of individual 3-HPMA values for all participating laboratories and for the corresponding sample set
  2. bReproducibility
  3. cRepeatability
  4. dcomposite intralaboratory coefficient of variation
  5. einter-laboratory coefficient of variation for the four participating laboratories
  6. fNA: not applicable due to data < LOQ