Dietary Calcium Intake and Risks of Stroke, Its Subtypes, and Coronary Heart Disease in Japanese

Abstract

Background and Purpose-Although it has been hypothesized that a high intake of dietary calcium may reduce the risk of cardiovascular disease (CVD), no prospective studies have been conducted to examine the specific association between calcium intake and incidence of stroke or coronary heart disease among Japanese with a low average calcium intake. Methods-To investigate the association between calcium intake and risk of CVD, a total of 41 526 Japanese men and women age 40 to 59 years without a history of CVD or cancer and who had completed a food consumption frequency questionnaire were enrolled in this study. The subjects were followed up from 1990 to 1992 to 2003, and after 533 692 person-years of follow-up, 1321 incident cases of stroke (664 ischemic, 425 intraparenchymal hemorrhage, and 217 subarachnoid hemorrhage) and 322 of coronary heart disease were documented. Results-Total calcium intake showed an inverse association with the risk of total stroke; the multivariable hazard ratio and 95% CIs for the highest versus the lowest quintile were 0.70 (95% CI, 0.56 to 0.88; P for trendϭ0.02). Dairy calcium intake was inversely associated with risks of total and ischemic stroke with respective multivariable hazard ratios (95% CIs) of 0.69 (0.56 to 0.85; P for trendϭ0.007) and 0.69 (0.52 to 0.93; P for trendϭ0.05). Dietary calcium intake was not significantly associated with risk of coronary heart disease. Conclusions-Dietary calcium intake, especially calcium from dairy products, was found to be associated with a reduced incidence of stroke among middle-aged Japanese.

Is dairy product consumption associated with the incidence of CHD?

“…We found no association between intake of the majority of the dairy products and CHD, a finding consistent with previous literature (15,17,20,23,32,36,37) . For example, in a case-control study of 378 men and 129 women aged 25-79 years, Tavani et al concluded that neither total milk, whole milk, semi-skimmed milk, yoghurt nor cheese was associated with increased CHD risk in men and women (1) .…”

Calcium supplementation and risk of dementia in women with cerebrovascular disease

“…31 Dietary calcium might be protective against vascular disease. 4,32 The difference between dietary calcium and calcium intake by supplements could be explained by variations in corresponding changes in serum calcium concentration. Dietary intake does not increase the serum calcium levels to the same extent as supplements.…”

Associations between dairy consumption and body weight: a review of the evidence and underlying mechanisms

“…; ( ), Azadbakht et al (27) ; ( ), Jacqmain et al (47) men; ( ), Jacqmain et al (47) women; ( ), Eilat-Adar et al (45) Strong Heart Study; ( ), Eilat-Adar et al (45) Third National Health and Nutrition Examination Survey; ( ), Van Dam et al (64) ; ( ), Engberink et al (60) ; ( ), Umesawa et al (62) ; ( ), linear (overall),…”