Journal of Laboratory Medicine and Quality Assurance

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Table. 4.

Table. 4.

Results of the provisional external quality control for the human epididymis protein 4 assay from 13 laboratories

LevelManu facturerNo. of laboratoriesMean±SD (pmol/L)CV (%)
IAbbott541.20±4.6711.3
Roche840.21±0.892.2
All methods1340.59±2.837.0
IIAbbott595.92±8.338.7
Roche892.84±2.332.5
All methods1394.03±5.365.7
IIIAbbott5373.08±42.8211.5
Roche8328.00±10.693.3
All methods13345.34±34.6310.0

The instruments were from the following companies: Abbott Laboratories (Abbott Park, IL, USA) and Roche Diagnostics GmbH (Mannheim, Germany).

Abbreviations: SD, standard deviation; CV, coefficient of variation.

J Lab Med Qual Assur 2019;41:153-60 https://doi.org/10.15263/jlmqa.2019.41.3.153
© 2019 J Lab Med Qual Assur