Additionally, dyslipidemia [crude OR (95% CI) 1.034 (1.026–1.042); adjusted OR (95% CI) 1.034 (1.026–1.042); P < 0.05 for all] and abnormal blood lipids [crude OR (95% CI) 1.021 (1.014–1.028); adjusted OR (95% CI) 1.020 (1.013–1.027); P < 0.05 for all] were significantly associated with complement C3 levels. The gene discussed is C3; the disease is metabolic syndrome.