Evidence map›Paper›PMID 30734846›Full record

ArticleEuropean journal of nutrition2020

Seasonal variation of diet quality in a large middle-aged and elderly Dutch population-based cohort.

Janine E van der Toorn, Magda Cepeda, Jessica C Kiefte-de Jong, Oscar H Franco, Trudy Voortman, Josje D Schoufour

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In one paragraph

Article in European journal of nutrition, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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

20 citing papers in PubMed, 2 syntheses or guidelines pooled it.

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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.

Janine E van der ToornDepartment of Epidemiology, Erasmus MC, University Medical Centre, PO Box 2040, 3000 CA, Rotterdam, The Netherlands.
Magda CepedaDepartment of Epidemiology, Erasmus MC, University Medical Centre, PO Box 2040, 3000 CA, Rotterdam, The Netherlands.ORCID http://orcid.org/0000-0003-4579-6033
Jessica C Kiefte-de JongDepartment of Epidemiology, Erasmus MC, University Medical Centre, PO Box 2040, 3000 CA, Rotterdam, The Netherlands.
Oscar H FrancoDepartment of Epidemiology, Erasmus MC, University Medical Centre, PO Box 2040, 3000 CA, Rotterdam, The Netherlands.
Trudy VoortmanDepartment of Epidemiology, Erasmus MC, University Medical Centre, PO Box 2040, 3000 CA, Rotterdam, The Netherlands. trudy.voortman@erasmusmc.nl.
Josje D SchoufourDepartment of Epidemiology, Erasmus MC, University Medical Centre, PO Box 2040, 3000 CA, Rotterdam, The Netherlands.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeSeveral studies have reported seasonal variation in intake of food groups and certain nutrients. However, whether this could lead to a seasonal pattern of diet quality has not been addressed. We aimed to describe the seasonality of diet quality, and to examine the contribution of the food groups included in the dietary guidelines to this seasonality.

methodsAmong 9701 middle-aged and elderly participants of the Rotterdam Study, a prospective population-based cohort, diet was assessed using food-frequency questionnaires (FFQ). Diet quality was measured as adherence to the Dutch dietary guidelines, and expressed in a diet quality score ranging from 0 to 14 points. The seasonality of diet quality and of the food group intake was examined using cosinor linear mixed models. Models were adjusted for sex, age, cohort, energy intake, physical activity, body mass index, comorbidities, and education.

resultsDiet quality had a seasonal pattern with a winter-peak (seasonal variation = 0.10 points, December-peak) especially among participants who were men, obese and of high socio-economic level. This pattern was mostly explained by the seasonal variation in the intake of legumes (seasonal variation = 3.52 g/day, December-peak), nuts (seasonal variation = 0.78 g/day, January-peak), sugar-containing beverages (seasonal variation = 12.96 milliliters/day, June-peak), and dairy (seasonal variation = 17.52 g/day, June-peak).

conclusionsDiet quality varies seasonally with heterogeneous seasonality of food groups counteractively contributing to the seasonal pattern in diet quality. This seasonality should be considered in future research on dietary behavior. Also, season-specific recommendations and policies are required to improve diet quality throughout the year.

Indexed as

Nutritional StatusSeasonsAgedCohort StudiesCross-Sectional StudiesDietDiet RecordsFemaleHumansMaleMiddle AgedNetherlandsNutrition PolicyProspective StudiesDietary guidelinesDiet qualityFood frequency questionnaireFood groupsSeasonality

Identifiers

PMID30734846
PMCPMC7058580

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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.