MUC1 and pulmonary arterial hypertension: The multivariable analysis demonstrated that associations with ILD in patients with SSc and muscle involvement [OR 2.551 (95% CI 1.054–6.175), P = 0.038], LVDD [OR 2.360 (95% CI 1.277–4.361), P = 0.006], PAH [OR 9.134 (95% CI 2.335–35.730), P = 0.001], dcSSc [OR 2.859 (95% CI 1.489–5.487), P = 0.002], PLR [OR 1.005 (95% CI 1.001–1.008), P = 0.020], elevated KL-6 [OR 2.033 (95% CI 1.099–3.763), P = 0.024], and Anti-Scl-70 antibody [OR 3.101 (95% CI 1.647–5.840), P < 0.001] were statistically significant (Table 3).