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Differences in evolution of children with non-severe acute lower respiratory tract infection with and without radiographically diagnosed pneumonia

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Abstract

Objective

To identify differences in the evolution of children with non-severe acute lower respiratory tract infection between those with and without radiographically diagnosed pneumonia.

Design

Prospective cohort study.

Setting

A public university pediatric hospital in Salvador, Northeast Brazil.

Patients

Children aged 2-59 months.

Methods

By active surveillance, the pneumonia cases were prospectively identified in a 2-year period. Each case was followed-up for changes in various clinical symptoms and signs. Demographic, clinical and radiographic data were recorded in standardized forms. Exclusion was due to antibiotic use in the previous 48 hours, signs of severe disease, refusal to give informed consent, underlying chronic illness, hospitalization in the previous 7 days or amoxicillin allergy. Chest X-ray (CXR) was later read by at least 2 independent pediatric radiologists.

Main Outcome Measures

Radiographic diagnosed pneumonia based on agreed detection of pulmonary infiltrate or pleural effusion in 2 assessments.

Results

A total of 382 patients receiving amoxicillin were studied, of whom, 372 (97.4%) had concordant radiographic diagnosis which was pneumonia (52%), normal CXR (41%) and others (7%). By multivariate analysis, age (OR=1.03; 95% CI: 1.02–1.05), disease ≥ 5days (OR = 1.04; 95% CI: 1.001-1.08), reduced pulmonary expansion (OR = 3.3; 95% CI: 1.4–8.0), absence of wheezing (OR = 0.5; 95% CI: 0.3–0.9), crackles on admission (OR = 2.0; 95% CI: 1.2–3.5), inability to drink on day 1 (OR = 4.2; 95% CI: 1.05–17.3), consolidation percussion sign (OR = 7.0; 95% CI: 1.5–32.3), tachypnea (OR = 2.0; 95% CI: 1.09–3.6) and fever (OR = 3.6; 95% CI: 1.4–9.4) on day 2 were independently associated with pneumonia. The highest positive predictive value was at the 2nd day of evolution for tachypnea (71.0%) and fever (81.1%).

Conclusion

Persistence of fever or tachypnea up to the second day of amoxicillin treatment is predictive of radiographically diagnosed pneumonia among children with non-severe lower respiratory tract diseases.

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Authors and Affiliations

  1. Department of Pediatrics, Federal University of Bahia School of Medicine, Salvador, Brazil

    M. -S. H. Fontoura, A. R. Matutino, C. C. Silva, M. C. Santana, M. Nobre-Bastos, B. B. Barreto, C. A. Araújo-Neto & C. M. Nascimento-Carvalho

  2. Bahiana School of Medicine, Bahiana Foundation for Science Development, Salvador, Brazil

    F. Oliveira & R. V. Brim

  3. Department of Image Diagnosis, Federal University of Bahia School of Medicine, Salvador, Brazil

    F. Oliveira & R. V. Brim

  4. Image Diagnosis Unit, Federal University of Bahia Hospital, Salvador, Brazil

    S. C. Andrade

  5. Department of Epidemiology, Faculty of Public Health, University of São Paulo, São Paulo, Brazil

    M. -R. A. Cardoso

  6. Rua Prof Aristides Novis, 105/1201B, Salvador, CEP 40210-630, Bahia, Brazil

    C. M. Nascimento-Carvalho

Authors
  1. M. -S. H. Fontoura
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  2. A. R. Matutino
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  3. C. C. Silva
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  4. M. C. Santana
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  5. M. Nobre-Bastos
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  6. F. Oliveira
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  7. B. B. Barreto
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  8. C. A. Araújo-Neto
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  9. S. C. Andrade
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  10. R. V. Brim
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  11. M. -R. A. Cardoso
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  12. C. M. Nascimento-Carvalho
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Consortia

Pneumopac-Efficacy Study Group

Corresponding author

Correspondence to C. M. Nascimento-Carvalho.

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Fontoura, M.S.H., Matutino, A.R., Silva, C.C. et al. Differences in evolution of children with non-severe acute lower respiratory tract infection with and without radiographically diagnosed pneumonia. Indian Pediatr 49, 363–369 (2012). https://doi.org/10.1007/s13312-012-0085-6

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  • DOI: https://doi.org/10.1007/s13312-012-0085-6

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