MEASUREMENT ERROR FROM ASSESSING USE OF VITAMIN SUPPLEMENTS AT ONE-POINT IN TIME

Citation
Re. Patterson et al., MEASUREMENT ERROR FROM ASSESSING USE OF VITAMIN SUPPLEMENTS AT ONE-POINT IN TIME, Epidemiology, 9(5), 1998, pp. 567-569
Citations number
11
Categorie Soggetti
Public, Environmental & Occupation Heath
Journal title
ISSN journal
10443983
Volume
9
Issue
5
Year of publication
1998
Pages
567 - 569
Database
ISI
SICI code
1044-3983(1998)9:5<567:MEFAUO>2.0.ZU;2-W
Abstract
Although many epidemiologic studies ask about current use of vitamin s upplements, long-term use is usually the exposure of etiologic interes t. We conducted a mailed survey to investigate the relation between cu rrent and long-term (10-year) supplement use (N = 325 adults). Estimat es of current daily intake for supplemental micronutrients were roughl y twice that of average daily intake over the past 10 years. Correlati ons between current intake and long-term intake from supplements alone were 0.77, 0.75, and 0.65 for vitamin C, vitamin E, and calcium, resp ectively. A measure of supplement use at one point in time incorporate s measurement error that will attenuate measures of association.