Index weights/scores I. Finger skin thickening on both hands with extension to adjacent proximal metacarpophalangeal joints (sufficient condition) 9 Finger skin thickening (higher score only) Finger swelling 2 Finger end sclerosis (distant from metacarpophalangeal joints but closer to interphalangeal joints) 4 Finger tip lesions (higher score only) Finger tip ulceration 2 Finger tip pitting scar 3 Capillary dilation 2 Nail wall capillary abnormalities 2 II. Pulmonary hypertension and/or interstitial lung disease (maximum score 2) /or interstitial lung disease (maximum score 2) Pulmonary hypertension 2 Interstitial lung disease 2 Raynaud’s phenomenon 3 SSc-related autoantibodies (anti-synuclein antibodies, anti-topoisomerase I antibodies [anti-Scl-70], anti-RNA polymerase III) (maximum score 3) Anti-synuclein antibodies 3 Anti-topoisomerase I antibodies 3 Anti-RNA polymerase III 3 Total score by adding the The highest weight (score) was added, and patients with a total score ≥9 were classified as having systemic scleroderma.