Decrease in the incidence and in hospital mortality of community-acquired pneumonia among children in Spain (2001–2014)

Publication date: 27 June 2017
Source:Vaccine, Volume 35, Issue 30
Author(s): Isabel Jimenez Trujillo, Ana Lopez de Andres, Valentin Hernandez-Barrera, Maria A. Martinez-Huedo, Javier de Miguel-Diez, Rodrigo Jimenez-Garcia
ObjectivesTo describe trends in the incidence and outcomes of community-acquired pneumonia (CAP) hospitalizations among Spanish children from 2001 to 2014 and to assess the effect of the pneumococcal vaccination (PCV) coverage in this period.MethodsThis study was conducted using the Spanish National Hospital Database from 2001 to 2014 including subjects <18years. We selected discharges with a primary diagnosis of CAP.Study variable included age, sex, comorbid conditions, procedures, isolated pathogens and hospital outcome variables.In order to estimate the effect of coverage of pneumococcal vaccination in hospitalizations for CAP, we used the number of commercialized doses of PCV (PCV7 PCV10, and PCV13) for each year.Incidence rates of admissions for CAP were calculated by dividing the number of admissions per year, sex, and age group by the corresponding number of people in that population group according to the census data.ResultsWe identified 194,419 admissions for CAP. Incidence rate was highest among children younger than 2years and decreased significantly by 3.67% per year over the study period in this age group. Among children aged 2–4years incidence of CAP seem to decrease after year 2009. S. pneumoniae isolations decreased significantly over time but virus isolations increased. In children aged <2years and 2–4years increase in PVC was associated to a decrease in the incidence of CAP hospitalizations.Overall crude in hospital mortality following CAP fell significantly from 4.1‰ in 2001–2003 to 2.8‰ in 2012–2014.ConclusionsCAP incidence rates decreased significantly among children <2years of age from 2001 to 2014. S. pneumoniae isolations decreased significantly over time but virus isolations increased. In hospital mortality paralleling CAP fell significantly in children and adolescents from 2001 to 2014. Improvement in vaccination coverage seems to have a mitigating effect on hospitalizations and outcomes for CAP in children.



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