BTG3 and arthritic joint disease: ANA ≥ 1/80, followed by anti-Ro, was the most frequent autoantibody in patients with UIP pattern and NSIP pattern at HRCT, ANA ≥ 1/80 and anti-Ro were the most frequent autoantibodies in patients with arthritis, while isolated positivity of anti-Ro was frequent in patients with Raynaud phenomenon.