Evidence map›Paper›PMID 34848440›Full record

SynthesisBMJ global health2021

The impact of childhood malnutrition on mortality from pneumonia: a systematic review and network meta-analysis.

Amir Kirolos, Rachel M Blacow, Arun Parajuli, Nicky J Welton, Alisha Khanna, Stephen J Allen, David A McAllister, Harry Campbell, Harish Nair

Open access · goldAbstract readSystematic ReviewNetwork Meta-Analysis
In one paragraph

Synthesis in BMJ global health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed, 1 pooled it
3.9field-weighted citation impact, top 6% 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

44 citing papers in PubMed, 1 synthesis or guideline pooled it, 61 citations in OpenAlex.

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  15. The Burden of Hospitalization Due toHealth science reports · 2025
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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 at 4 institutions in 2 countries.

Amir KirolosUniversity of Liverpool Department of Women's and Children's Health, Liverpool, UK a.kirolos@liverpool.ac.uk.ORCID 0000-0003-2995-330X
Rachel M BlacowThe University of Edinburgh Usher Institute, Edinburgh, UK.
Arun ParajuliThe University of Edinburgh Usher Institute, Edinburgh, UK.
Nicky J WeltonUniversity of Bristol Bristol Population Health Science Institute, Bristol, UK.
Alisha KhannaThe University of Edinburgh Usher Institute, Edinburgh, UK.
Stephen J AllenClinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK.
David A McAllisterUniversity of Glasgow Institute of Health and Wellbeing, Glasgow, UK.
Harry CampbellThe University of Edinburgh Usher Institute, Edinburgh, UK.
Harish NairThe University of Edinburgh Usher Institute, Edinburgh, UK.
University of Edinburgh · GBUniversity of Liverpool · GBUniversity of Bristol · GBUniversity of Glasgow · GB

Funding

Medical Research Council MR/P015298/1Wellcome TrustWellcome Trust 201492/Z/16/ZWellcome Trust 203919/Z/16/Z
6 · The paper itself

Abstract

introductionChildhood malnutrition is widespread in low-income and middle-income countries (LMICs) and increases the frequency and severity of infections such as pneumonia. We aimed to identify studies investigating pneumonia deaths in malnourished children and estimate mortality risk by malnutrition severity.

methodsWe conducted a systematic review of MEDLINE, EMBASE and Global Health databases to identify relevant studies. We used a network meta-analysis to derive ORs of death from pneumonia for moderately and severely underweight children using low weight-for-age, the most reported measure of malnutrition. We compared meta-estimates of studies conducted before and after 2000 to assess changes in mortality risk over time. We estimated the prevalence of underweight hospitalised children from hospital-based cohort studies and calculated the population attributable fraction of in-hospital pneumonia deaths from being underweight using our results.

resultsOur network meta-analysis included 33 544 underweight children from 23 studies. The estimated OR of death from pneumonia was 2.0 (95% CI 1.6 to 2.6) and 4.6 (95% CI 3.7 to 5.9) for children moderately and severely underweight, respectively. The OR of death from pneumonia for those severely underweight was 5.3 (95% CI 3.9 to 7.4) pre-2000 and remained high post-2000 at 4.1 (95% CI 3.0 to 6.0). Prevalence of underweight children hospitalised with pneumonia varied (median 40.2%, range 19.6-66.3) but was high across many LMIC settings. We estimated a median 18.3% (range 10.8-34.6) and 40.9% (range 14.7-69.9) of in-hospital pneumonia deaths were attributable to being moderately and severely underweight, respectively.

conclusionsThe risk of death from childhood pneumonia dramatically increases with malnutrition severity. This risk has remained high in recent years with an estimated over half of in-hospital pneumonia deaths attributable to child malnutrition. Prevention and treatment of all child malnutrition must be prioritised to maintain progress on reducing pneumonia deaths.

Indexed as

MalnutritionPneumoniaChildGlobal HealthHumansPovertyepidemiologynutritionpneumoniapublic healthsystematic review

Identifiers

PMID34848440
PMCPMC8634228
OpenAlexW3215845621

What OpenQuestion holds

Textmetadata
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.