Laboratory Medicine and Quality Assurance

Table. 3.

The statistical profiles of each monoclonal protein detected in samples EP-23-02 and EP-23-04 according to the quantitation method

Variable No. Mean±SD CV (%) Median Min Max P-value
EP-23-02 0.001*
Standard perpendicular drop method 16 14.36±5.32 37.0 12.8 3.0 21.9
Corrected perpendicular drop method 6 9.45±1.98 20.9 10.4 5.5 10.6
Tangent skimming method 7 6.22±1.91 30.7 5.6 4.1 9.9
Total 29 11.38±5.40 47.4 10.5 3.0 21.9
EP-23-04 0.002*
Standard perpendicular drop method 16 10.60±4.49 42.4 10.0 3.0 19.6
Corrected perpendicular drop method 6 8.15±0.92 11.3 8.3 6.9 9.1
Tangent skimming method 6 3.68±1.29 35.1 4.3 1.3 4.7
Total 28 8.30±4.62 55.6 7.6 1.3 19.6

Abbreviations: SD, standard deviation; CV, coefficient of variation; Min, minimal value; Max, maximal value.

*P<0.05 represents the statistical significance. One laboratory did not report the value of monoclonal protein for sample EP-23-04.

Lab Med Qual Assur 2024;46:43~54 https://doi.org/10.15263/jlmqa.2024.46.1.43
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