Evidence map›Paper›PMID 24678699›Full record

ArticleEnvironmental health : a global access science source2014

Decline in temperature and humidity increases the occurrence of influenza in cold climate.

Kari Jaakkola, Annika Saukkoriipi, Jari Jokelainen, Raija Juvonen, Jaana Kauppila, Olli Vainio, Thedi Ziegler, Esa Rönkkö, Jouni Jk Jaakkola, Tiina M Ikäheimo and 1 more

Open access · goldAbstract read
In one paragraph

Article in Environmental health : a global access science source, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 77 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
77citing papers in PubMed, 4 pooled it
5.7field-weighted citation impact, top 4% 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

77 citing papers in PubMed, 4 syntheses or guidelines pooled it, 171 citations in OpenAlex.

  1. Global meta-analysis of short-term associations between ambient temperature and pathogen-specific respiratory infections, 2004 to 2023.Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin · 2025
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17 more citing papers are in PubMed but not listed here.

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

11 authors at 6 institutions in 1 country.

Kari Jaakkola
Annika Saukkoriipi
Jari Jokelainen
Raija Juvonen
Jaana Kauppila
Olli Vainio
Thedi Ziegler
Esa Rönkkö
Jouni Jk Jaakkola
Tiina M IkäheimoInstitute of Health Sciences, University of Oulu, P,O, Box 5000, FI-90014 Oulu, Finland. tiina.ikaheimo@oulu.fi.
KIAS-Study Group
Finnish Institute for Health and Welfare · FIUniversity of Oulu · FIFinnish Defence Forces · FIKajaani University of Applied Sciences · FINordLab · FIOulu University Hospital · FI

Funding

Household air pollution in Tanzania, placental health and pregnancy outcomeK23ES021471 · NIEHS · MASSACHUSETTS GENERAL HOSPITAL · PI WYLIE, BLAIR JOHNSON · 2012 to 2016
$1.3M
Burden of Malaria in Pregnancy in IndiaR03HD052167 · NICHD · BOSTON UNIVERSITY MEDICAL CAMPUS · PI HAMER, DAVIDSON HOWES · 2006 to 2007
$160k
NICHD NIH HHS 1 R03 HD52167-01NIEHS NIH HHS K23ES021471
6 · The paper itself

Abstract

backgroundBoth temperature and humidity may independently or jointly contribute to the risk of influenza infections. We examined the relations between the level and decrease of temperature, humidity and the risk of influenza A and B virus infections in a subarctic climate.

methodsWe conducted a case-crossover study among military conscripts (n = 892) seeking medical attention due to respiratory symptoms during their military training period and identified 66 influenza A and B cases by PCR or serology. Meteorological data such as measures of average and decline in ambient temperature and absolute humidity (AH) during the three preceding days of the onset (hazard period) and two reference periods, prior and after the onset were obtained.

resultsThe average temperature preceding the influenza onset was -6.8 ± 5.6°C and AH 3.1 ± 1.3 g/m3. A decrease in both temperature and AH during the hazard period increased the occurrence of influenza so that a 1°C decrease in temperature and 0.5 g decrease per m3 in AH increased the estimated risk by 11% [OR 1.11 (1.03 to 1.20)] and 58% [OR 1.58 (1.28 to 1.96)], respectively. The occurrence of influenza infections was positively associated with both the average temperature [OR 1.10 per 1°C (95% confidence interval 1.02 to 1.19)] and AH [OR 1.25 per g/m3 (1.05 to 1.49)] during the hazard period prior to onset.

conclusionOur results demonstrate that a decrease rather than low temperature and humidity per se during the preceding three days increase the risk of influenza episodes in a cold climate.

Indexed as

BetainfluenzavirusHumidityInfluenza A virusTemperatureAdolescentAdultCold ClimateFinlandHumansInfluenza, HumanMaleOdds RatioYoung Adult

Identifiers

PMID24678699
PMCPMC3978084
OpenAlexW2141130672

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.