Low concentrations of HDL (below 40 mg/dL for men, below 50 mg/dL for women) increase the risk for atherosclerotic diseases. Data from the landmark Framingham Heart Study showed that, for a given level of LDL, the risk of heart disease increases 10-fold as the HDL varies from high to low.
evacuation. 1  the act or process of evacuating, or the condition of being evacuated; discharge or expulsion, as of contents. 2  Physiology. discharge, as of waste matter through the excretory passages, especially from the bowels. 3  something evacuated or discharged. 4  the removal of persons or things from an endangered area.
the forced or strategic withdrawal of an army or an armed force before an enemy, or the withdrawing of a naval force from action. the act of withdrawing, as into safety or privacy; retirement; seclusion. a place of refuge, seclusion, or privacy: The library was his retreat. an asylum, as for the insane.