Original article
Will lowering population levels of serum cholesterol affect total mortality? Expectations from the honolulu heart program

https://doi.org/10.1016/0895-4356(92)90034-KGet rights and content

Abstract

Major campaigns now underway to reduce the serum cholesterol levels of entire national populations have not given serious consideration to the high rates of non-cardiovascular disease and death associated with low cholesterol levels (< 190 mg/dl). To explore this problem, the relationships between serum cholesterol levels, measured in 1965–1968 in 7478 Japanese American men in Hawaii, and subsequent total and cause-specific mortality through 1985, were analyzed by multivariate Cox regression to control for potential confounders. Total mortality rates for 1648 deaths showed a U-shaped curve by baseline cholesterol level, with significant inverse trends (p < 0.03) for deaths due to hemorrhagic stroke, all cancer, benign liver disease, chronic obstructive lung disease and “unknown cause”. Only the inverse trends for cancer and benign liver disease showed flattening when 227 deaths in the first 5 years of follow-up were deleted from the analysis. Simulation models using three different strategies of cholesterol reduction in this cohort revealed that none of these approaches had any substantial impact on predicted total mortality over 15 years. However, the population-based approach might theoretically increase mortality for 60% of the cohort with baseline cholesterol levels less than 225 mg/dl.

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    Preliminary versions of portions of this paper were presented at the Annual Meeting of the American Epidemiological Society, Baltimore, 23 March 1990; the NHLBI Conference on Low Blood Cholesterol: Disease Associations, Bethesda, 12 October 1990; and the Society for Epidemiological Research, Buffalo, 12 June 1991.

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