Table 1: Correlation between DFS and other IIF patterns and anti-DFS70 antibodies by ELISA and CIA.

AssayDFS patternOther patternsPositive % agreement*Negative % agreement*

DFS70 CIA91/100 (91.0%)3/100 (3.0%)91.0% (83.6–95.8%)97.0% (91.5–99.4%)
ANA ELISA35/100 (35.0%)67/100 (67.0%)67.0% (56.9–76.1%)65.0% (54.8–74.3%)

*Positive and negative percent agreements were calculated based on the target cohort: For DFS70 CIA the target cohort is the group of samples with DFS pattern and the control cohort is the group of samples with other ANA patterns; for ANA ELISA the target cohort is the group of samples with other ANA patterns and the control cohort is the group of samples with DFS patterns.