Document Detail


Diurnal and monthly intra-individual variability of the concentration of lipids, lipoproteins and apoproteins.
MedLine Citation:
PMID:  2247768     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Diurnal and monthly variability of the serum concentration of lipids, lipoproteins and apoproteins were examined in 11 healthy subjects aged 32-63 (mean 46) years. For diurnal measurements, blood samples were drawn at 0800, 1200, 1500, 1800, and 2100 hours. The variability over 1 month was assessed from four analyses taken weekly at 0800 hours after at least 8 h fast. The analytical variability expressed as mean coefficient of variation (CV) ranged from 0.95% for cholesterol to 7.6% for apoprotein B. The mean CVs for diurnal biological variability were 2.4% for cholesterol, 3.5% for HDL-cholesterol, 5.1% for LDL-cholesterol, 29.5% for triglycerides, 6.5% for apoprotein A and 6.5% for apoprotein B. The respective biological CVs for monthly variability were 4.2%, 4.1%, 5.2%, 20.7%, 9.4% and 9.7%. A repeated-measures ANOVA revealed a significant increase of triglycerides (p less than 0.01) and decrease of LDL-cholesterol (p less than 0.01) during the day. Within 1 month, apoprotein A tended to rise (0.05 less than p less than 0.10). Although the best reproducibility was found for cholesterol, the results obtained indicate that six tests have to be taken before and after intervention by drug or diet to detect a reduction of 10% in an individual with a probability of 0.95.
Authors:
A Wasenius; M Stugaard; J E Otterstad; D Frøyshov
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Scandinavian journal of clinical and laboratory investigation     Volume:  50     ISSN:  0036-5513     ISO Abbreviation:  Scand. J. Clin. Lab. Invest.     Publication Date:  1990 Oct 
Date Detail:
Created Date:  1991-01-08     Completed Date:  1991-01-08     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0404375     Medline TA:  Scand J Clin Lab Invest     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  635-42     Citation Subset:  IM    
Affiliation:
Medical Department, Vestfold Central Hospital, Tønsberg, Norway.
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MeSH Terms
Descriptor/Qualifier:
Adult
Apolipoproteins A / blood
Apolipoproteins B / blood
Apoproteins / blood*
Cholesterol / blood
Cholesterol, HDL / blood
Cholesterol, LDL / blood
Circadian Rhythm*
Female
Humans
Lipids / blood*
Lipoproteins / blood*
Male
Middle Aged
Time Factors
Triglycerides / blood
Chemical
Reg. No./Substance:
0/Apolipoproteins A; 0/Apolipoproteins B; 0/Apoproteins; 0/Cholesterol, HDL; 0/Cholesterol, LDL; 0/Lipids; 0/Lipoproteins; 0/Triglycerides; 57-88-5/Cholesterol

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