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1.
Int J Epidemiol ; 30(5): 1063-70, 2001 Oct.
Article in English | MEDLINE | ID: mdl-11689523

ABSTRACT

BACKGROUND: The aim of this study is to describe trends in plasma total and high density lipoprotein (HDL) cholesterol in The Netherlands between 1993 and 1997 and to examine whether these trends in cholesterol could be explained by changes in body mass index, smoking, alcohol intake, use of cholesterol lowering medication, intake of saturated fat, trans fatty acids and dietary cholesterol. METHODS: Each year a random sample of men and women aged 20-59 years living in three towns in The Netherlands was invited to participate in the study. In total more than 21 000 people were examined. RESULTS: Between 1993 and 1997 plasma total cholesterol decreased significantly by 0.19 mmol/l in men and by 0.27 mmol/l in women. During this period HDL cholesterol remained stable in both men and women. Small decreases were observed in the intake of saturated fat, trans fatty acids and dietary cholesterol in both men and women. The use of cholesterol lowering medication and for women oral contraceptives and prescribed oestrogens increased significantly. After adjustment for these determinants in multivariate analyses the trend in total cholesterol remained highly significant. CONCLUSIONS: Between 1993 and 1997 the mean total cholesterol level decreased significantly while the mean HDL cholesterol remained stable in both men and women in The Netherlands. The observed trend in total cholesterol could only for a small part be explained by changes in the determinants studied.


Subject(s)
Cholesterol, HDL/blood , Lipoproteins/blood , Adult , Alcohol Drinking , Body Mass Index , Diet , Female , Humans , Male , Middle Aged , Netherlands/epidemiology , Regression Analysis , Seroepidemiologic Studies , Smoking
2.
Clin Chem ; 43(8 Pt 1): 1306-10, 1997 Aug.
Article in English | MEDLINE | ID: mdl-9267305

ABSTRACT

Cholesterol and triglyceride standardization procedures have been used extensively and continuously since the 1950s. Definitive and Reference Methods, as well as primary and secondary standards, have been developed and maintained as the basis for evaluating the accuracy of results by various methods in many laboratories. But, although standardization efforts for apolipoprotein A-I and B measurements have been reported in detail in the scientific literature, much less has been reported in the area of total and lipoprotein cholesterol and triglyceride standardization efforts. Standardized cholesterol and triglyceride concentrations, determined in multiple large epidemiological and clinical studies, have been instrumental to the National Cholesterol Education Program panels that have assessed the lipoprotein values associated with risk of coronary disease, and have determined the cutpoints that are now used extensively by physicians to guide diagnosis and treatment of individual patients.


Subject(s)
Blood Chemical Analysis/standards , Cholesterol/blood , Lipids/blood , Lipoproteins/blood , Triglycerides/blood , Apolipoproteins/blood , Centers for Disease Control and Prevention, U.S. , Coronary Disease/blood , Humans , National Institutes of Health (U.S.) , Reference Standards , Reference Values , Risk Factors , Societies, Scientific , United States , World Health Organization
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