Cancer Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Richard Doll Building, Roosevelt Drive, Oxford, OX3 7LF, UK.
Department of Public Health & Primary Care, Institute of Public Health, University of Cambridge, Cambridge, UK.
Eur J Nutr. 2021 Oct;60(7):4019-4030. doi: 10.1007/s00394-021-02558-4. Epub 2021 May 6.
The Oxford WebQ is a web-based 24-h dietary assessment method which has been used in UK Biobank and other large prospective studies. The food composition table used to calculate nutrient intakes has recently been replaced with the UK Nutrient Databank, which has food composition data closer in time to when participants completed the questionnaire, and new dietary variables were incorporated. Here we describe the updated version of the Oxford WebQ questionnaire nutrient calculation, and compare nutrient intakes with the previous version used.
207,144 UK Biobank participants completed ≥ 1 Oxford WebQs, and means and standard deviations of nutrient intakes were averaged for all completed 24-h dietary assessments. Spearman correlations and weighted kappa statistics were used to compare the re-classification and agreement of nutrient intakes between the two versions.
35 new nutrients were incorporated in the updated version. Compared to the previous version, most nutrients were very similar in the updated version except for a few nutrients which showed a difference of > 10%: lower with the new version for trans-fat (- 20%), and vitamin C (- 15%), but higher for retinol (+ 42%), vitamin D (+ 26%) and vitamin E (+ 20%). Most participants were in the same (> 60%) or adjacent (> 90%) quintile of intake for the two versions. Except for trans-fat (r = 0.58, κ = 0.42), very high correlations were found between the nutrients calculated using the two versions (r > 0.79 and κ > 0.60).
Small absolute differences in nutrient intakes were observed between the two versions, and the ranking of individuals was minimally affected, except for trans-fat.
牛津网络问卷（Oxford WebQ）是一种基于网络的 24 小时膳食评估方法，已在英国生物库（UK Biobank）和其他大型前瞻性研究中使用。用于计算营养素摄入量的食物成分表最近已被英国营养数据库（UK Nutrient Databank）所取代，该数据库中的食物成分数据更接近参与者完成问卷时的时间，并且还纳入了新的饮食变量。本文描述了更新后的牛津网络问卷问卷营养素计算版本，并比较了新旧版本的营养素摄入量。
207144 名英国生物库参与者完成了≥1 次牛津网络问卷，所有完成的 24 小时膳食评估的营养素摄入量的平均值和标准差。使用 Spearman 相关系数和加权 kappa 统计量比较了两个版本之间营养素再分类和一致性的差异。
更新版本中纳入了 35 种新营养素。与旧版本相比，更新版本中的大多数营养素非常相似，只有少数几种营养素的差异超过 10%：新版本中反式脂肪（-20%）和维生素 C（-15%）的含量较低，而视黄醇（+42%）、维生素 D（+26%）和维生素 E（+20%）的含量较高。对于两种版本，大多数参与者都处于相同（>60%）或相邻（>90%）的五分位数范围内。除反式脂肪（r=0.58，κ=0.42）外，两种版本计算的营养素之间存在非常高的相关性（r>0.79，κ>0.60）。
两种版本之间观察到营养素摄入量的绝对差异较小，除反式脂肪外，个体的排名受影响最小。
