PDF(Pubmed)
Abstract：
Previous studies investigating temporal changes in dietary supplement (DS) use have used representative samples but have not followed the same cohort over time. This study investigated longitudinal patterns of changes in DS use and factors associated with discontinuing DS use in a single group of active-duty United States military service members (SMs). SMs (n = 5778) completed two identical questionnaires on their DS use and demographic/lifestyle characteristics an average ± standard deviation 1.3 ± 0.2 years apart. Prevalences of reported DS use ≥1 times/week in the baseline (BL) and follow-up (FU) phases were: any DS, BL = 77%, FU = 78%; multivitamins/multiminerals (MVM), BL = 50%, FU = 48%; individual vitamins/minerals, BL = 33%, FU 35%; proteins/amino acids, BL = 43%, FU = 39%; combination products, BL = 44%, FU = 37%; prohormones, BL = 5%, FU = 4%; herbal products, BL = 23%, FU = 21%; joint health products, BL = 12%, FU = 12%; fish oils, BL = 25%, FU = 23%; other DSs, BL = 17%, FU = 17%. Among BL users, the proportions reporting use in the FU phase were: any DS 88%, MVM 74%, protein/amino acids 70%, individual vitamin/minerals 62%, combination products 62%, fish oils 61%, joint health products 57%, herbal products 50%, other DSs 50%, and prohormones 37%. Higher odds of discontinuing any DS use in the follow-up were associated with female gender, younger age, higher BMI, and less weekly resistance training. Overall, prevalence of DS use was relatively consistent in the two phases; however, the cohort changed their use patterns in the follow-up with some discontinuing use and others initiating use, thus maintaining use prevalence over the period. These findings have implications for repeated cross-sectional DS studies where different samples are followed over time.
摘要：
以前调查膳食补充剂（DS）使用时间变化的研究使用了代表性样本，但随着时间的推移，没有遵循相同的队列。这项研究调查了一组现役美国军人（SM）中DS使用变化的纵向模式以及与停止DS使用相关的因素。SMs（n=5778）完成了两份相同的DS使用和人口统计学/生活方式特征问卷，平均±标准差为1.3±0.2年。在基线（BL）和随访（FU）阶段报告的DS使用≥1次/周的发生率为：任何DS，BL=77%,FU=78%；多种维生素/多种矿物质（MVM），BL=50%,FU=48%；个体维生素/矿物质，BL=33%,FU35%;蛋白质/氨基酸,BL=43%，FU=39%；组合产品，BL=44%，FU=37%；激素原，BL=5%,FU=4%；草药产品，BL=23%，FU=21%；联合保健品，BL=12%,FU=12%；鱼油，BL=25%,FU=23%；其他DS，BL=17%，FU=17%。在BL用户中，FU阶段报告使用的比例为：任何DS88%，MVM74%,蛋白质/氨基酸70%,个体维生素/矿物质62%，组合产品62%，鱼油61%,联合保健品57%，草药产品50%,其他DS50%，和前激素37%。在随访中停止使用任何DS的几率较高，与女性有关。年龄较小,BMI较高,减少每周的阻力训练。总的来说,DS使用的患病率在两个阶段相对一致；然而，队列在后续行动中改变了他们的使用模式，一些停止使用，另一些开始使用，从而在这段时间内保持使用率。这些发现对重复的横截面DS研究有意义，在这些研究中，随着时间的推移，跟踪不同的样本。
