Robson Paula J, Siou Geraldine Lo, Ullman Ruth, Bryant Heather E
Division of Population Health and Information, Alberta Cancer Board, 14th Floor, Sun Life Place, 10123 99th Street, Edmonton, Alberta, Canada, T5J 3H1.
Public Health Nutr. 2008 Dec;11(12):1238-47. doi: 10.1017/S136898000800219X. Epub 2008 May 6.
To determine the extent to which differences in sociodemographic, dietary and lifestyle characteristics exist between users of different types of dietary supplements and supplement non-users.
We analysed cross-sectional data obtained from self-administered questionnaires completed at baseline by participants in The Tomorrow Project; a prospective cohort study in Alberta, Canada. Participants who used at least one type of dietary supplement at least weekly in the year prior to questionnaire completion were defined as supplement users, while the remainder were classified as non-users. Seven discrete user categories were created: multivitamins (+/- minerals) only, specific nutritional supplements only, herbal/other supplements only, and all possible combinations. Differences in sociodemographic, dietary and lifestyle characteristics between different groups of supplement users and non-users were analysed using Rao-Scott chi2 tests and multinomial logistic regression.
Subjects were 5,067 men and 7,439 women, aged 35-69 years, recruited by random digit dialling throughout Alberta.
Supplement use was extensive in this study population (69.8 %). Users of herbal/other supplements only, and women who used multivitamins only, tended to report dietary and lifestyle characteristics that were not significantly different from non-users. In contrast, those who reported using a combination of multivitamins, specific nutritional and herbal/other supplements were more likely than non-users to report behaviours and characteristics consistent with current health guidelines.
Dichotomizing participants as supplement users or non-users is likely to mask further differences in sociodemographic, dietary and lifestyle characteristics among users of different types of supplements. This may have implications for analysis and interpretation of observational studies.
确定不同类型膳食补充剂使用者与非使用者在社会人口统计学、饮食和生活方式特征方面的差异程度。
我们分析了从《明日项目》参与者在基线时自行填写的问卷中获得的横断面数据；这是一项在加拿大艾伯塔省进行的前瞻性队列研究。在问卷填写前一年至少每周使用一种膳食补充剂的参与者被定义为补充剂使用者，其余参与者则被归类为非使用者。创建了七个离散的使用者类别：仅使用多种维生素（含/不含矿物质）、仅使用特定营养补充剂、仅使用草药/其他补充剂以及所有可能的组合。使用Rao-Scott卡方检验和多项逻辑回归分析不同组别的补充剂使用者和非使用者在社会人口统计学、饮食和生活方式特征方面的差异。
研究对象为通过在艾伯塔省随机拨号招募的5067名男性和7439名女性，年龄在35 - 69岁之间。
在该研究人群中，补充剂的使用很广泛（69.8%）。仅使用草药/其他补充剂的使用者以及仅使用多种维生素的女性，其报告的饮食和生活方式特征与非使用者相比无显著差异。相比之下，那些报告同时使用多种维生素、特定营养补充剂和草药/其他补充剂的人比非使用者更有可能报告与当前健康指南一致的行为和特征。
将参与者分为补充剂使用者或非使用者可能会掩盖不同类型补充剂使用者在社会人口统计学、饮食和生活方式特征方面的进一步差异。这可能会对观察性研究的分析和解释产生影响。
