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 | 0 | 1 | 0 | 12 | |||
| Specific gravity | 1 | 0 | 0 | 0 | 0 | 0 | 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 | |
| 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 | 0 | 19 | |||
| UroColor Control 2 (N=20) | Bilirubin | N | 0 | 0 | 0 | 0 | 0 | 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 | 0 | 14 | |||
| 9.5 | 0 | 0 | 0 | 3 | 0 | 0 | 3 | ||
| Specific gravity | 1.005 | 20 | 7 | 20 | 0 | 0 | 47 | ||
| 1.01 | 0 | 13 | 0 | 2 | 0 | 15 | |||
| 1.015 | 0 | 0 | 0 | 2 | 3 | 5 | |||
| 1.02 | 0 | 0 | 0 | 0 | 8 | ||||
| 1.025 | 0 | 0 | 0 | 0 | 8 | ||||
| UC-Control 2 (N=10) | Bilirubin | N | 0 | 0 | 0 | 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.