APOB and hyperlipidemia: The serum apoM concentration in the PNS without hyperlipidemia group also positively correlated with HDL-C, LDL-C, apoA1, and apoB (r = 0.458, P = 0.003; r = 0.423, P = 0.017; r = 0.254, P = 0.022; and r = 0.427, P = 0.036, respectively).