Unexpected link between high cholesterol and death rates in sudden heart problems

A history of hypercholesterolemia is associated with lower in-hospital mortality in patients with acute coronary syndromes.

• In a study of 84,429 patients, a history of hypercholesterolemia showed a protective association with in-hospital mortality, indicated by an unadjusted odds ratio of 0.58.
• This association remained significant after adjusting for baseline characteristics, with an odds ratio of 0.71.
• Prior statin use also contributed to the protective effect, with an adjusted odds ratio of 0.74.
• Among 22,711 patients without a prior diagnosis of hypercholesterolemia, those newly diagnosed in-hospital had lower unadjusted mortality compared to those with normal LDL levels (OR: 0.58).
• However, the mortality difference for newly diagnosed hypercholesterolemia was not significant after multivariable adjustment (OR: 0.86).
• The findings suggest that the observed paradox may arise from confounding factors, including other clinical characteristics and the impact of statin treatment.

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