Table. 4.

Analysis of matrix effects of YD Diagnostics QC in blood, bilirubin urobilinogen, glucose, pH, and specific gravity tests

Tests Controls Grade Results

1st test 2nd test


YD SD Roche Siemens Sysmex Arkray Total YD SD Roche Sysmex Arkray Total
Blood QC2 Trace 0 0 0 1 0 0 1 0 0 39 0 40 79
1+ 0 0 0 1 0 20 21 0 0 1 38 0 39
2+ 0 0 20 17 20 0 57 40 31 0 2 0 73
3+ 20 20 0 1 0 0 41 0 9 0 0 0 9
4+ 0 0 0 0 0 0 0 0 0 0 0 0 0
Bilirubin QC4 Neg 0 0 0 0 20 0 20 0 0 0 0 0 0
1+ 0 0 0 0 0 0 0 0 0 0 0 0 0
2+ 0 0 0 0 0 0 0 0 0 0 0 38 38
3+ 20 15 20 20 0 20 95 40 40 40 40 2 162
Urobilinogen QC4 Neg 0 0 0 0 0 0 0 0 0 0 0 2 2
Trace 0 0 0 0 0 0 0 0 0 0 0 0 0
1+ 0 0 0 0 0 20 20 0 0 5 0 38 43
2+ 0 0 20 0 0 0 20 2 0 35 0 0 37
3+ 20 12 0 20 16 0 68 38 36 0 4 0 78
4+ 0 3 0 0 4 0 7 0 4 0 36 0 40
Glucose QC2 Neg 20 20 20 20 20 20 120 0 0 0 0 0 0
1+ 0 0 0 0 0 0 0 0 0 0 0 0 0
2+ 0 0 0 0 0 0 0 31 0 1 0 0 32
3+ 0 0 0 0 0 0 0 9 0 39 0 0 48
4+ 0 0 0 0 0 0 0 0 40 0 40 40 120
QC4 Trace 9 0 0 0 0 0 9 0 0 0 0 0 0
1+ 11 0 0 0 0 0 11 40 0 5 0 0 45
2+ 0 1 0 16 0 0 17 0 40 35 14 0 89
3+ 0 13 20 4 1 0 38 0 0 0 25 40 65
4+ 0 1 0 0 19 20 40 0 0 0 1 0 1
pH QC4 5 0 0 0 0 0 0 0 0 5 0 0 0 5
5.5 0 0 0 0 0 0 0 40 32 0 33 0 105
6 0 0 0 0 0 0 0 0 3 0 7 30 40
6.5 20 15 0 0 20 14 69 0 0 40 0 10 50
7 0 0 20 20 0 6 46 0 0 0 0 0 0
Specific gravity QC2 1 0 0 0 4 15 0 19 0 11 0 33 0 44
1.005 19 20 20 0 5 20 84 0 29 0 7 31 67
1.01 1 0 0 16 0 0 17 0 0 0 0 9 9
1.015 0 0 0 0 0 0 0 40 0 40 0 0 80

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 that differed more than 1 grade from the most frequent results were indicated in bold font.

Abbreviations: QC, quality control; Neg, negative.

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