LPL and type 2 diabetes mellitus: Among 2708 northeastern Chinese adults in the current study, the main findings were that LPL was positively associated with serum 25(OH)D concentration; LPL and serum 25(OH)D concentration were inversely associated with the prevalence of IR and T2D; whereas the associations of 25(OH)D with IR and T2D were attenuated by further adjusted for LPL.