| Anti-ARS positive (n = 12) | Anti-ARS negative (n = 23) | P value |
Age at onset (mean±SD) | 49.7 ± 13.7 | 62.6 ± 10.6 | 0.004 |
Male/ female | 3/9 | 12/11 | 0.16 |
Fever (%) | 25 | 17 | 0.67 |
Arthralgia/Arthritis (%) | 42 | 35 | 0.73 |
Raynaud’s phenomenon (%) | 50 | 4 | 0.003 |
Sclerodactyly (%) | 17 | 13 | 1.00 |
Sicca syndrome(%) | 25 | 9 | 0.31 |
KL-6 elevation (%) | 91 | 87 | 1.00 |
ANA (%) | 17 | 17 | 1.00 |
RF (%) | 33 | 22 | 0.69 |
Histopathologically UIP (%, n/total available data) | 25 (2/8) | 59 (10/17) | 0.20 |