PRTN3 and interstitial lung disease: The mean age at the ILD diagnosis was 67.4 ± 10.4 years, and in these patients, we observed a significantly longer disease duration (p < 0.0001) and a higher prevalence of rheumatoid factor (RF) (p = 0.0036), anti-citrullinated protein antibodies (ACPA) (p = 0.0049), and both (p = 0.0077).