Evidence map›Paper›PMID 33342077›Full record

ArticleInfluenza and other respiratory viruses2021

Independent association between meteorological factors, PM2.5, and seasonal influenza activity in Hangzhou, Zhejiang province, China.

Steven Yuk-Fai Lau, Wei Cheng, Zhao Yu, Kirran N Mohammad, Maggie Haitian Wang, Benny Chung-Ying Zee, Xi Li, Ka Chun Chong, Enfu Chen

Abstract read
In one paragraph

Article in Influenza and other respiratory viruses, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 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

15 citing papers in PubMed, 1 synthesis or guideline 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

9 authors.

Steven Yuk-Fai LauSchool of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China.
Wei ChengZhejiang Province Centre for Disease Control and Prevention, Hangzhou, China.
Zhao YuZhejiang Province Centre for Disease Control and Prevention, Hangzhou, China.
Kirran N MohammadSchool of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China.
Maggie Haitian WangSchool of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China.
Benny Chung-Ying ZeeSchool of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China.
Xi LiSchool of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China.
Ka Chun ChongSchool of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China.ORCID 0000-0001-5610-1298
Enfu ChenZhejiang Province Centre for Disease Control and Prevention, Hangzhou, China.ORCID 0000-0001-5449-1528

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDue to variations in climatic conditions, the effects of meteorological factors and PM

methodsA total of 20 165 laboratory-confirmed influenza cases in Hangzhou, Zhejiang province, were documented in our dataset and aggregated into weekly counts for downstream analysis. We employed a combination of the quasi-Poisson-generalized additive model and the distributed lag non-linear model to examine the relationship of interest, controlling for long-term trends, seasonal trends, and holidays.

resultsA hockey-stick association was found between absolute humidity and the risk of influenza infections. The overall cumulative adjusted relative risk (ARR) was statistically significant when weekly mean absolute humidity was low (<10 µg/m

conclusionsThe present study contributes additional knowledge to the understanding of the effects of various environmental factors on influenza activities. Our findings shall be useful and important for the development of influenza surveillance and early warning systems.

Indexed as

Influenza, HumanChinaHumansHumidityMeteorological ConceptsParticulate MatterSeasonsTemperatureParticulate MatterhumidityinfluenzaPM2.5rainfallsubtropictemperature

Identifiers

PMID33342077
PMCPMC8189232

What OpenQuestion holds

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LicenceCC BY
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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.