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首页> 外文期刊>Journal of epidemiology / >Online version of the self-administered food frequency questionnaire for the Japan Public Health Center-based Prospective Study for the Next Generation (JPHC-NEXT) protocol: Relative validity, usability, and comparison with a printed questionnaire
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Online version of the self-administered food frequency questionnaire for the Japan Public Health Center-based Prospective Study for the Next Generation (JPHC-NEXT) protocol: Relative validity, usability, and comparison with a printed questionnaire

机译：基于日本公共卫生中心的下一代前瞻性研究（JPHC-NEXT）协议的自助式食品频率问卷的在线版本：相对有效性，可用性以及与印刷问卷的比较

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Background: Online dietary assessment tools offer advantages over printed questionnaires, such as the automatic and direct data storage of answers, and have the potential to become valuable research methods. We developed an online survey system (web-FFQ) for the existing printed FFQ used in the JPHC-NEXT protocol, the platform of a large-scale genetic cohort study. Here, we examined the validity of ranking individuals according to dietary intake using this web-FFQ and its usability compared with the printed questionnaire (print-FFQ) for combined usage. Methods: We included 237 men and women aged 40–74 years from five areas specified in the JPHC-NEXT protocol. From 2012 to 2013, participants were asked to provide 12-day weighed food records (12d-WFR) as the reference intake and to respond to the print- and web-FFQs. Spearman's correlation coefficients (CCs) between estimates using the web-FFQ and 12d-WFR were calculated. Cross-classification of intakes was compared with those using the print-FFQ. Results: Most participants (83%) answered that completing the web-FFQ was comparable to or easier than completing the printed questionnaire. The median value of CCs across energy and 53 nutrients for men and women was 0.47 (range, 0.10–0.86) and 0.46 (range, 0.16–0.69), respectively. CCs for individual nutrient intakes were closely similar to those based on the print-FFQ, irrespective of response location. Cross-classification by quintile of intake based on two FFQs was reasonably accurate for many nutrients and food groups. Conclusion: This online survey system is a reasonably valid measure for ranking individuals by intake for many nutrients, like the printed FFQ. Mixing of two FFQs for exposure assessments in epidemiological studies appears acceptable.
机译：背景：在线膳食评估工具比打印的问卷更具优势，例如答案的自动和直接数据存储，并且有可能成为有价值的研究方法。我们为大规模遗传队列研究的平台JPHC-NEXT协议中使用的现有印刷FFQ开发了一个在线调查系统（web-FFQ）。在这里，我们检查了使用该网页式FFQ根据饮食摄入量对个人进行排名的有效性及其与印刷问卷（print-FFQ）组合使用时的可用性。方法：我们纳入了JPHC-NEXT协议中指定的五个区域的237位年龄在40-74岁之间的男女。从2012年到2013年，要求参与者提供12天称重食品记录（12d-WFR）作为参考摄入量，并对印刷品和网上FFQ做出回应。计算了使用Web-FFQ和12d-WFR进行估计之间的Spearman相关系数（CCs）。将摄入量的交叉分类与使用印刷FFQ的交叉分类进行比较。结果：大多数参与者（83％）回答说，完成网络问卷调查与完成打印问卷相当或容易。男性和女性的能量和53种营养素的CC平均值分别为0.47（范围0.10-0.86）和0.46（范围0.16-0.69）。不管响应位置如何，单个养分摄入量的CC与基于FFQ的CC极为相似。对于两个营养素和食物组，基于两个FFQ的摄入量按五分位数进行交叉分类是相当准确的。结论：该在线调查系统是一种合理有效的度量，用于按摄入的许多营养素（例如印刷的FFQ）对摄入量进行排名。在流行病学研究中将两种FFQ混合用于暴露评估似乎是可以接受的。

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