Evidence map›Paper›PMID 33498916›Full record

ArticleNutrients2021

Hypertensive Disorders of Pregnancy in Relation to Coffee and Tea Consumption: The Japan Environment and Children's Study.

Yoko Kawanishi, Aiko Kakigano, Takashi Kimura, Satoyo Ikehara, Takuyo Sato, Takuji Tomimatsu, Tadashi Kimura, Hiroyasu Iso, On Behalf Of The Japan Environment And Children's Study Group

Open access · goldAbstract read
In one paragraph

Article in Nutrients, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 2 pooled it
3.7field-weighted citation impact, top 8% 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

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

  1. Pooled it
  2. Pooled it
  3. Article
  4. Article
  5. Article
  6. Review
  7. Review
  8. Article
  9. Hypertensive disorders of pregnancy: definition, management, and out-of-office blood pressure measurement.Hypertension research : official journal of the Japanese Society of Hypertension · 2022
    Review
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

9 authors at 4 institutions in 1 country.

Yoko KawanishiDepartment of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita-shi, Osaka 565-0871, Japan.ORCID 0000-0001-6946-6093
Aiko KakiganoDepartment of Obstetrics and Gynecology, National Cerebral and Cardiovascular Center, 6-1, Kisibeshinmachi, Suita-shi, Osaka 564-8565, Japan.ORCID 0000-0001-9623-6234
Takashi KimuraDepartment of Public Health, Hokkaido University Graduate School of Medicine, North 15, West 7, Kita-Ku, Sapporo-Shi, Hokkaido 060-8638, Japan.ORCID 0000-0002-6839-8962
Satoyo IkeharaPublic Health, Department of Social Medicine, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita-shi, Osaka 565-0871, Japan.
Takuyo SatoDivision of Community Health and Research, Osaka Women's and Children's Hospital, 840, Murodocho, Izumi-shi, Osaka 594-1101, Japan.
Takuji TomimatsuDepartment of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita-shi, Osaka 565-0871, Japan.
Tadashi KimuraDepartment of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita-shi, Osaka 565-0871, Japan.
Hiroyasu IsoPublic Health, Department of Social Medicine, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita-shi, Osaka 565-0871, Japan.
On Behalf Of The Japan Environment And Children's Study Group
The University of Osaka · JPHokkaido University · JPNational Cerebral and Cardiovascular Center · JPOsaka Women's and Children's Hospital · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe association between coffee/tea intake and hypertensive disorders of pregnancy (HDP) remains unclear. This study aimed to investigate the association of caffeine, coffee, and tea intake during pregnancy with the risk of HDP.

methodsWe assessed this association in 85,533 singleton pregnant women with live births in the Japan Environment and Children's Study, a prospective cohort in Japan that included women from early pregnancy onward. Caffeinated and decaffeinated coffee and tea (green, oolong, and black) consumption during pregnancy was assessed using a validated food frequency questionnaire conducted at mid-pregnancy, and caffeine intake was calculated based on coffee and tea consumption. Multivariable logistic regression was used to assess the association with the risk of HDP.

resultsHDP developed in 2222 women (2.6%). Caffeine intake was weakly associated with increased risk of HDP; the multivariable odds ratio of HDP for the highest versus the lowest quartile was 1.26 (95% confidence interval: 1.11, 1.43). Coffee drinkers of two or more cups per day showed a decreased risk compared with non-drinkers (multivariable odds ratio 0.79; 0.62, 0.99) even after adjustment for total caffeine intake. Tea consumption was not associated with the risk of HDP.

conclusionsOur study suggests that higher caffeine intake may increase HDP risk, while coffee drinkers had a lower risk. Further high-quality studies are needed to replicate these findings, and to elucidate if other substances in coffee may be protective against HDP.

Indexed as

CoffeeTeaAdultCaffeineDrinking BehaviorFemaleHumansHypertension, Pregnancy-InducedPregnancyProspective StudiesRisk FactorsCaffeineCoffeeTeacaffeinecoffeehypertensive disorders of pregnancytea

Identifiers

PMID33498916
PMCPMC7912571
OpenAlexW3125267630

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.