Table. 1.

Changes in the levels of ANA by indirect immunofluorescence assay in the pooled sera according to the storage condition and duration

ANA Storage condition Baseline 1 week 2 weeks 1 month 3 months 6 months
Negative –20℃ <1:40 <1:40 <1:40 <1:40 <1:40 <1:40
4℃ <1:40 <1:40 <1:40 <1:40 <1:40 <1:40
RT <1:40 <1:40 <1:40 <1:40 <1:40 <1:40
Homogeneous –20℃ 1:160 1:160 1:160 1:160 1:160 1:160
4℃ 1:160 1:160 1:160 1:160 1:160 1:160
RT 1:160 1:160 1:160 1:160 1:160 1:160
Speckled –20℃ 1:320 1:320 1:320 1:320 1:320 1:320
4℃ 1:320 1:320 1:320 1:320 1:320 1:320
RT 1:320 1:320 1:320 1:320 1:320 1:320

Abbreviations: ANA, anti-nuclear antibody; RT, room temperature (20℃–24℃).

Lab Med Qual Assur 2021;43:72~79 https://doi.org/10.15263/jlmqa.2021.43.2.72
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