Evidence map›Paper›PMID 26201316›Full record

ArticleBMC infectious diseases2015

Analysis of influenza transmission in the households of primary and junior high school students during the 2012-13 influenza season in Odate, Japan.

Taro Kamigaki, Satoshi Mimura, Yoshihiro Takahashi, Hitoshi Oshitani

Abstract read
In one paragraph

Article in BMC infectious diseases, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
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8citing papers in PubMed, 1 pooled it
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1 · What the graph read from it

What it found

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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

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3 · Its place in the literature

Who cites it

8 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

4 authors.

Taro KamigakiDepartment of Virology, Tohoku University Graduate School of Medicine, Sendai, Japan. kamigakit@med.tohoku.ac.j.
Satoshi MimuraDepartment of Virology, Tohoku University Graduate School of Medicine, Sendai, Japan. mimuras@med.tohoku.ac.jp.
Yoshihiro TakahashiDivision of Pediatrics, Odate Municipal Hospital, Odate, Japan. tyoshihi@odate-hp.odate.akita.jp.
Hitoshi OshitaniDepartment of Virology, Tohoku University Graduate School of Medicine, Sendai, Japan. oshitanih@med.tohoku.ac.jp.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundHouseholds are one of the major settings of influenza transmission in the community and transmission is frequently initiated by school-aged children. We surveyed households with primary school (PS) and/ or junior high school (JH) children for the 2012-13 influenza season in Odate, Japan then characterized the epidemiology of influenza household transmission as well as estimated the serial intervals.

methodsWe delivered a self-reported questionnaire survey to households with PS and/or JH school children in Odate City, Japan. Influenza A (H3N2) virus predominantly circulated during the 2012-13 influenza season. We investigated the epidemiological characteristics of within-household transmission and calculated the serial intervals (SI). SIs were drew by a non-parametric model and compared with parametric models by the Akaike Information Criterion. The covariable contributions were investigated by the accelerated failure model.

resultsHousehold influenza transmission was identified in 255 out of 363 household respondents. Primary school (PS) children accounted for 45.1 % of primary cases, and disease transmission was most commonly observed between PS children and parents, followed by transmission from PS children to siblings. In primary cases of PS or JH children, younger age and longer absence from school were significantly associated with household transmission events. The mean SI was estimated as 2.8 days (95 % confidence interval 2.6-3.0 days) in the lognormal model. The estimated acceleration factors revealed that while secondary school age and the absence duration > 7 days were associated with shorter and longer SIs, respectively, antiviral prescriptions for primary cases made no contribution.

conclusionsHigh frequencies of household transmission from primary school with shorter SI were found. These findings contribute to the development of future mitigation strategies against influenza transmission in Japan.

Indexed as

Family CharacteristicsAdolescentAdultAgedAntiviral AgentsChildChild, PreschoolFemaleHumansInfluenza A Virus, H3N2 SubtypeInfluenza, HumanJapanMaleMiddle AgedSchoolsSeasonsAntiviral Agents

Identifiers

PMID26201316
PMCPMC4512025

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