Evidence map›Paper›PMID 34323381›Full record

ArticleInfluenza and other respiratory viruses2022

Incidence rates of influenza illness during pregnancy in Suzhou, China, 2015-2018.

Liling Chen, Suizan Zhou, Lin Bao, Alexander J Millman, Zhongwei Zhang, Yan Wang, Yayun Tan, Ying Song, Pengwei Cui, Yuanyuan Pang and 8 more

Open access · goldAbstract read
In one paragraph

Article in Influenza and other respiratory viruses, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
0.8field-weighted citation impact, top 29% 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

11 citing papers in PubMed, 10 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

18 authors at 3 institutions in 3 countries.

Liling ChenSuzhou Center for Disease Control and Prevention, Suzhou, China.ORCID 0000-0002-2868-741X
Suizan ZhouU.S. Centers for Disease Control and Prevention, Atlanta, GA, USA.
Lin BaoSuzhou Center for Disease Control and Prevention, Suzhou, China.
Alexander J MillmanU.S. Centers for Disease Control and Prevention, Atlanta, GA, USA.
Zhongwei ZhangSuzhou Municipal Hospital, Suzhou, China.
Yan WangWuzhong Maternal and Child Health Care Institute, Suzhou, China.
Yayun TanSuzhou Center for Disease Control and Prevention, Suzhou, China.
Ying SongU.S. Centers for Disease Control and Prevention, Atlanta, GA, USA.
Pengwei CuiSuzhou Center for Disease Control and Prevention, Suzhou, China.
Yuanyuan PangSuzhou Center for Disease Control and Prevention, Suzhou, China.
Cheng LiuSuzhou Center for Disease Control and Prevention, Suzhou, China.
Jiangchun QinSuzhou Center for Disease Control and Prevention, Suzhou, China.
Ping ZhangSuzhou Center for Disease Control and Prevention, Suzhou, China.
Mark G ThompsonU.S. Centers for Disease Control and Prevention, Atlanta, GA, USA.
A Danielle IulianoU.S. Centers for Disease Control and Prevention, Atlanta, GA, USA.
Ran ZhangU.S. Centers for Disease Control and Prevention, Atlanta, GA, USA.
Carolyn M GreeneU.S. Centers for Disease Control and Prevention, Atlanta, GA, USA.
Jun ZhangSuzhou Center for Disease Control and Prevention, Suzhou, China.
Centers for Disease Control and Prevention · USSuzhou Municipal Hospital · CNYunnan Maternal and Child Health · CN

Funding

CGH CDC HHS U2G GH000018
6 · The paper itself

Abstract

backgroundData on influenza incidence during pregnancy in China are limited.

methodsFrom October 2015 to September 2018, we conducted active surveillance for acute respiratory illness (ARI) among women during pregnancy. Nurses conducted twice weekly phone and text message follow-up upon enrollment until delivery to identify new episodes of ARI. Nasal and throat swabs were collected ≤10 days from illness onset to detect influenza.

resultsIn total, we enrolled 18 724 pregnant women median aged 28 years old, 37% in first trimester, 48% in second trimester, and 15% in third trimester, with seven self-reported influenza vaccination during pregnancy. In the 18-week epidemic period during October 2015 to September 2016, influenza incidence was 0.7/100 person-months (95% CI: 0.5-0.9). In the cumulative 29-week-long epidemic during October 2016 to September 2017, influenza incidence was 1.0/100 person-months (95% CI: 0.8-1.2). In the 11-week epidemic period during October 2017 to September 2018, influenza incidence was 2.1/100 person-months (95% CI: 1.9-2.4). Influenza incidence was similar by trimester. More than half of the total influenza illnesses had no elevated temperature and cough. Most influenza-associated ARIs were mild, and <5.1% required hospitalization.

conclusionsInfluenza illness in all trimesters of pregnancy was common. These data may help inform decisions regarding the use of influenza vaccine to prevent influenza during pregnancy.

Indexed as

Influenza, HumanInfluenza VaccinesPregnancy Complications, InfectiousAdultChinaFemaleHumansIncidenceMalePregnancyInfluenza Vaccinesactive surveillancecohortincidence rateinfluenzapregnant women

Identifiers

PMID34323381
PMCPMC8692813
OpenAlexW3168843689

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

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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.