IJE Advance Access published online on August 24, 2008
International Journal of Epidemiology, doi:10.1093/ije/dyn169
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Hypothesis: Is Lactose a Dietary Risk Factor for Ischaemic Heart Disease?i
308 Cricklewood Lane London NW2 UK
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Summary The prevalence of primary adult lactose malabsorption (LM) in 23 ethnic groups was matched with national data on milk consumption and mortality rates from ischaemic heart disease (HD). In 6 other ethnic groups prevalence of LM was related to unquantified assessments of milk consumption and frequency of IHD.
On the available data, populations with a prevalence of LM over 30%, and whose consumption of milk is low or is largely in low lactose form, have a lower risk of IHD mortality than populations with a prevalence of LM under 30% and a high milk consumption. There is evidence against attributing these findings to genetic linkage between susceptibility to IHD mortality and persistent lactose absorption, or to differences in socio-economic development, cigarette consumption or intake of animal fats. The findings are compatible with an hypothesis that, if the correlation reported previously between milk consumption and IHD mortality is causal, lactose could be the responsible dietary factor.
iFirst published. Int J Epidemiol., September 1980; 9: 271 - 276
Accepted 23 July 2008