Table. 2.

Analysis of the matrix effect of four QC materials

QC materials Test name Grade Company

YD SD Roche Siemens Sysmex Arkray Total
Aution Check level 2 (N=20) pH 7.5 19 0 0 0 3 0 22
8 0 7 9 0 15 20 51
8.5 0 12 0 19 1 0 32
9 0 0 11 0 1 0 12
Specific gravity 1 0 0 0 0 0 20 20
1.005 0 0 0 0 1 0 1
1.01 1 19 0 15 19 0 54
1.015 19 0 20 3 0 0 42
Liquichek level 2 (N=20) Urobilinogen 1+ 0 0 0 0 0 20 20
2+ 0 0 20 0 0 0 20
3+ 13 17 0 19 16 0 65
4+ 7 1 0 0 3 0 11
Specific gravity 1.015 0 0 0 5 0 0 5
1.02 18 17 20 14 0 20 89
1.025 2 1 0 0 0 0 3
1.03 0 0 0 0 19 0 19
UroColor Control 2 (N=20) Bilirubin N 0 0 0 0 0 20 20
1+ 0 0 4 0 0 0 4
2+ 0 8 16 4 4 0 32
3+ 20 12 0 0 16 0 48
pH 8 20 18 19 0 3 0 60
8.5 0 2 0 1 4 20 27
9 0 0 1 0 13 0 14
9.5 0 0 0 3 0 0 3
Specific gravity 1.005 20 7 20 0 0 Low 47
1.01 0 13 0 2 0 Low 15
1.015 0 0 0 2 3 Low 5
1.02 0 0 0 0 8 Low 8
1.025 0 0 0 0 8 Low 8
UC-Control 2 (N=10) Bilirubin N 0 10 0 0 6 0 16
tr 0 0 0 0 0 0 0
1+ 0 0 0 0 0 0 0
2+ 0 0 0 0 3 0 3
3+ 10 0 10 10 1 10 41
UC-Control 2 (N=10) Ketone 1+ 0 0 0 10 0 0 10
2+ 10 10 0 0 0 0 20
3+ 0 0 10 0 10 10 30
Specific gravity 1.015 0 10 0 4 0 0 14
1.02 1 0 0 6 0 0 7
1.025 9 0 10 0 8 10 37
1.03 0 0 0 0 2 0 2

The instruments were from the following companies: YD (YD Diagnostics, Yongin, Korea), SD (Standard Diagnostics, Seoul, Korea), Roche (Roche Diagnostics, Mannheim, Germany), Siemens (Siemens Healthcare, Erlangen, Germany), Sysmex (Sysmex Co., Kobe, Japan), and Arkray (Arkray Inc., Kyoto, Japan). The results showing error message were not included. The results that differed more than 1 grade from the most frequent results were indicated in bold font.

Abbreviation: QC, quality control.

J Lab Med Qual Assur 2020;42:200~210 https://doi.org/10.15263/jlmqa.2020.42.4.200
© Lab Med Qual Assur