CD4 and systemic sclerosis: After the final correction in model 3 revealed that risk factors for SSc included LDL-C (OR = 3.212, 95% CI = 1.132-9.113, p =0.028), ESR (OR = 1.218, 95% CI = 1.086-1.367, p = 0.001), CRP (OR = 2.156, 95% CI = 1.393-3.338, p = 0.001), Th (CD3+CD4+) cell (OR = 1.004, 95% CI = 1.001-1.008, p = 0.034).