Laboratory Medicine and Quality Assurance

Table. 3.

Results of proficiency tests for qualitative autoimmune testing (ANA, AMA, SMA, and anti-dsDNA)

Trial Tests No. of participants Specimen Response

Negative Positive
2018, 1st ANA 74 IA1-18-01 0 74 (100.0)
IA1-18-02 74 (100.0) 0
IA1-18-03 0 74 (100.0)
AMA 20 IA1-18-04 19 (95.0) 1 (5.0)
IA1-18-05 1 (5.0) 19 (95.0)
SMA 20 IA1-18-04 3 (15.0) 17 (85.0)
IA1-18-05 19 (95.0) 1 (5.0)
Anti-dsDNA 46 IA2-18-03 46 (100.0) 0
IA2-18-04 1 (2.2) 45 (97.8)
2018, 2nd ANA 72 IA1-18-06 1 (1.4) 71 (98.6)
IA1-18-07 72 (100.0) 0
IA1-18-08 0 72 (100.0)
AMA 17 IA1-18-09 2 (11.8) 15 (88.2)
IA1-18-10 16 (94.1) 1 (5.9)
SMA 16 IA1-18-09 15 (93.8) 1 (6.3)
IA1-18-10 1 (6.3) 15 (93.8)
Anti-dsDNA 46 IA2-18-07 46 (100.0) 0
IA2-18-08 1 (2.2) 45 (97.8)
2019, 1st ANA 77 IA1-19-01 75 (97.5) 2 (2.5)
IA1-19-02 0 77 (100.0)
IA1-19-03 0 77 (100.0)
AMA 19 IA1-19-04 19 (100.0) 0
IA1-19-05 0 19 (100.0)
SMA 19 IA1-19-04 18 (94.7) 1 (5.3)
IA1-19-05 19 (100.0) 0
Anti-dsDNA 52 IA2-19-03 52 (100.0) 0
IA2-19-04 5 (9.6) 47 (90.4)
2019, 2nd ANA 77 IA1-19-06 76 (98.7) 1 (1.3)
IA1-19-07 0 77 (100.0)
IA1-19-08 0 77 (100.0)
AMA 18 IA1-19-09 18 (100.0) 0
IA1-19-10 0 18 (100.0)
SMA 18 IA1-19-09 18 (100.0) 0
IA1-19-10 18 (100.0) 0
Anti-dsDNA 50 IA2-19-07 50 (100.0) 0
IA2-19-08 2 (4.0) 48 (96.0)

Values are presented as number (%), unless otherwise stated. Intended responses are indicated in bold.

Abbreviations: ANA, anti-nuclear antibody; AMA, anti-mitochondrial antibody; SMA, anti-smooth muscle antibody; anti-dsDNA, anti-double strand DNA antibody.

Lab Med Qual Assur 2020;42:1~9 https://doi.org/10.15263/jlmqa.2020.42.1.1
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