Evidence map›Paper›PMID 28223084›Full record

ArticleJournal of epidemiology2017

Validation of a food frequency questionnaire for Japanese pregnant women with and without nausea and vomiting in early pregnancy.

Kohei Ogawa, Seung-Chik Jwa, Minatsu Kobayashi, Naho Morisaki, Haruhiko Sago, Takeo Fujiwara

Open access · goldAbstract read
In one paragraph

Article in Journal of epidemiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 1 pooled it
2.6field-weighted citation impact, top 11% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

22 citing papers in PubMed, 1 synthesis or guideline pooled it, 39 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 1 country.

Kohei OgawaDepartment of Social Medicine, National Research Institute for Child Health and Development, Tokyo, Japan; Center of Maternal-fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, Tokyo, Japan; Collaborative Departments of Advanced Pediatric Medicine, Graduate School of Medicine, Tohoku University, Sendai, Japan.
Seung-Chik JwaDepartment of Social Medicine, National Research Institute for Child Health and Development, Tokyo, Japan; Center of Maternal-fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, Tokyo, Japan.
Minatsu KobayashiDepartment of Food Science, Otsuma Women's University, Tokyo, Japan.
Naho MorisakiDepartment of Social Medicine, National Research Institute for Child Health and Development, Tokyo, Japan.
Haruhiko SagoCenter of Maternal-fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, Tokyo, Japan; Collaborative Departments of Advanced Pediatric Medicine, Graduate School of Medicine, Tohoku University, Sendai, Japan.
Takeo FujiwaraDepartment of Social Medicine, National Research Institute for Child Health and Development, Tokyo, Japan. Electronic address: fujiwara-tk@ncchd.go.jp.
National Center For Child Health and Development · JPTohoku University · JPOtsuma Women's University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundNo previous study has shown the validity of a food frequency questionnaire (FFQ) in early pregnancy with consideration of nausea and vomiting during pregnancy (NVP). The aim of this study was to evaluate the validity of a FFQ in early pregnancy for Japanese pregnant women.

methodWe included 188 women before 15 weeks of gestation and compared estimated nutrient intake and food group intake based on a modified FFQ with that based on 3-day dietary records (DRs). Spearman's rank correlation coefficients, adjusting energy intake and attenuating within-person error, were calculated. Subgroup analysis for those with and without NVP was conducted. We also examined the degree of appropriate classification across categories between FFQ and DRs through division of consumption of nutrients and food groups into quintiles.

resultsCrude Spearman's correlation coefficients of nutrients ranged from 0.098 (sodium) to 0.401 (vitamin C), and all of the 36 nutrients were statistically significant. In 27 food groups, correlation coefficients ranged from -0.015 (alcohol) to 0.572 (yogurt), and 81% were statistically significant. In subgroup analysis, correlation coefficients in 89% of nutrients and 70% of food groups in women with NVP and 97% of nutrients and 74% of food groups in women without NVP were statistically significant. On average, 63.7% of nutrients and 60.4% of food groups were classified into same or adjacent quintiles according to the FFQ and DRs.

conclusionsThe FFQ is a useful instrument, regardless of NVP, for assessing the diet of women in early pregnancy in Japan.

Indexed as

Asian PeopleDiet RecordsEnergy IntakeMorning SicknessSurveys and QuestionnairesAdultBody Mass IndexCohort StudiesDiet SurveysFeeding BehaviorFemaleHumansJapanMiddle AgedNutrition AssessmentPregnancyFood frequency questionnaireJapanNauseaPregnancyValidation

Identifiers

PMID28223084
PMCPMC5394225
OpenAlexW2589509698

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.