Reliability and validity of self-report of vitamin and mineral supplement use in the vitamins and lifestyle study
Reliability and validity of self-report of vitamin and mineral supplement use in the vitamins and lifestyle study
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DOI：
10.1093/aje/kwg039
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发表时间：
2003-05-15
影响因子：
5
通讯作者：
White, E
中科院分区：
文献类型：
--
作者：
Satia-Abouta, J;Patterson, RE;White, E
在美国，膳食补充剂占微量营养素摄入量的很大比例。因此，为研究微量营养素和疾病风险，收集有关补充剂使用的准确信息是很重要的。本报告描述了一份关于维生素和矿物质补充剂使用情况的详细邮寄问卷的重测信度和效度。参与者(n=220)在基线和3个月后完成问卷调查。在面对面的采访中，参与者提供现场尿液和血液样本，采访者从他们的补充剂瓶标签上转录营养信息。问卷对过去10年的平均补充摄入量具有非常好的重测信度，组内相关系数从0.69到0.87不等。皮尔逊将问卷和访谈/标签转录的当前补充摄入量进行比较的相关系数很高，从0.58到0.82不等；然而，对于某些营养素，问卷的中位摄入量略低于访谈。β-胡萝卜素、维生素C和维生素E(α-生育酚)显示出明显的线性趋势，即血液浓度随着自我报告的补充摄入量的增加而增加(经潜在混杂因素和饮食调整后的皮尔逊相关系数分别为0.31、0.29和0.69；均P<；0.0001)。肌酐调整后的尿钙值与补充钙摄入量无关(Pearson‘s r=-0.07)。该问卷具有较高的重复性和效度，可用于收集有关补充剂使用的详细信息。
In the United States, dietary supplements contribute a large proportion of micronutrient intakes. Therefore, it is important to collect accurate information on supplement use for studies of micronutrients and disease risk. This report describes the test-retest reliability and validity of a detailed, self-administered mailed questionnaire on vitamin and mineral supplement use. Participants (n = 220) completed the questionnaire at baseline and 3 months later. During an in-person interview, participants provided spot urine and blood samples, and interviewers transcribed nutrient information from their supplement bottle labels. The questionnaire had very good test-retest reliability for mean supplement intake over the past 10 years, with intraclass correlations ranging from 0.69 for beta-carotene to 0.87 for vitamin E. Pearson's correlation coefficients comparing current supplemental intakes from the questionnaire and interviews/label transcriptions were high, ranging from 0.58 for beta-carotene to 0.82 for chromium; however, for some nutrients, median intakes from the questionnaire were slightly lower than from the interviews. Beta-carotene, vitamin C, and vitamin E (alpha-tocopherol) showed clear linear trends of increasing blood concentrations with higher self-reported supplemental intakes (Pearson's correlation coefficients adjusted for potential confounding factors and diet = 0.31, 0.29, and 0.69, respectively; all p < 0.0001). Creatinine-adjusted spot urinary calcium values were not associated with supplemental calcium intakes (Pearson's r = -0.07). This self-administered questionnaire demonstrated high reproducibility and validity for collecting detailed information on supplement use.