Evidence map›Paper›PMID 20166818›Full record

ArticleClinical infectious diseases : an official publication of the Infectious Diseases Society of America2010

Increasing incidence of empyema complicating childhood community-acquired pneumonia in the United States.

Carlos G Grijalva, J Pekka Nuorti, Yuwei Zhu, Marie R Griffin

Abstract read
In one paragraph

Article in Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
73citing papers in PubMed, 6 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

73 citing papers in PubMed, 6 syntheses or guidelines pooled it.

  1. Pooled it
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  4. Complicated pneumococcal pneumonia in the era of higher-valent pneumococcal conjugate vaccines: a systematic literature review and meta-analysis, 2001-2022.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2025
    Pooled it
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  7. BinaxNOWClinical pediatrics · 2026
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  19. Childhood pneumonia in New Zealand.Journal of paediatrics and child health · 2022
    Article
  20. The impact of pneumococcal conjugate vaccine on the prevalence and severity of hospitalizations for pneumonia in children.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2022
    Article

13 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

4 authors.

Carlos G GrijalvaDepartment of Preventive Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee 37212, USA. carlos.grijalva@vanderbilt.edu
J Pekka Nuorti
Yuwei Zhu
Marie R Griffin

Funding

Evaluating the Impact of a Large School-based Influenza Immunization CampaignK01IP000163 · IP · VANDERBILT UNIVERSITY · PI GRIJALVA, CARLOS G · 2007 to 2009
$437k
ATSDR CDC HHS TS-1454NCIRD CDC HHS K01 IP000163NCPDCID CDC HHS K01 CI000163
6 · The paper itself

Abstract

backgroundThe incidence of childhood pneumonia decreased following introduction of 7-valent pneumococcal conjugate vaccine (PCV7) in the United States. Recent regional reports suggest an increase in the incidence of childhood pneumonia complicated by empyema. We assessed whether early decreases in pneumonia hospitalization rates were sustained and trends in such hospitalizations complicated by empyema in United States children aged <5 years.

methodsNationwide Inpatient Sample and Census data were used to calculate annual all-cause and pneumococcal pneumonia hospitalization rates for pre-PCV7 (1996-1999) and post-PCV7 years (2001-2007) and to analyze national trends in total and pathogen-specific pneumonia-associated empyema.

resultsAmong children aged <2 years, all-cause pneumonia hospitalizations decreased 33% (95% confidence interval, 28%-37%) from 1267 cases per 100,000 children in pre-PCV7 years to 852 cases per 100,000 children in post-PCV7 years. Pneumococcal pneumonia hospitalization rates decreased 61% (95% confidence interval, 55%-67%) post-PCV7, compared with pre-PCV7 years. Pneumonia hospitalizations complicated by empyema increased 2.01-fold from 3.5 cases per 100,000 children in 1996-1998 to 7.0 cases per 100,000 children in 2005-2007. Rates of pneumococcal and streptococcal empyema remained stable, whereas rates of staphylococcal and other or unspecified empyema increased 4.08- and 1.89-fold, respectively. Among children aged 2-4 years, all-cause pneumonia rates remained stable, whereas pneumococcal pneumonia decreased by 26% (95% confidence interval, 16-34). Pneumonia complicated by empyema increased 2.81-fold from 3.7 cases per 100,000 children in 1996-1998 to 10.3 cases per 100,000 children in 2005-2007. In this age group, there were 2.17-, 2.80-, 3.76-, and 3.09-fold increases in rates of pneumococcal, streptococcal, staphylococcal, and other or unspecified empyema, respectively.

conclusionDecreases in childhood pneumonia hospitalization rates following PCV7 introduction were sustained. Although empyema complicated only a small fraction of pneumonia hospitalizations, its prevalence increased substantially. This increase was due to several pathogens and warrants continuing monitoring.

Indexed as

Child, PreschoolCommunity-Acquired InfectionsEmpyemaFemaleHumansIncidenceInfantMalePneumonia, BacterialUnited States

Identifiers

PMID20166818
PMCPMC4696869

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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.