The burden of hospitalized all-cause and pneumococcal pneumonia in Spain (2010)

Objectives : Estimate the incidence of hospitalized all-cause pneumonia (PN) and pneumococcal pneumonia (PP) among all ages in Spain in 2010. Methods : A retrospective study analysed data from IASIST, a Spanish data source covering more than 65% of National Health System discharges (170 hospitals from 15 out of 17 regions). Cases were Spanish residents admitted to participating hospitals during 2010, with a diagnosis of PN or PP based on ICD-9 codes. Hospitalization rates, in-hospital mortality rates, co-morbidities and length of stay were computed. Population data were provided by IASIST (2010: 10,984,724). Results : In 2010, there were 32, 726 incident cases of PN across all ages with incidence rate of 2.98/1000 per year; highest in children 0-4 years (4.87/1000) and adults ≥ 65 years (10.18/1000). There were 4,984 incident cases of PP across all ages with incidence rate of 45.37/100,000; highest in children 0-4 years (53.59/100,000) and adults ≥ 65 years (158.18/100,000). Hospital mortality rates for PN across all ages were 7.87% per year and 5.87% for PP; highest in adults ≥ 65 years (10.97% for PN, 7.67% for PP). Average length of inpatient stay for PN across all ages was 10.20 days and 11.17 days for PP; highest in adults ≥ 65 years (11.26 days for PN, 11.81 days for PP). Most frequent co-morbidities for adults ≥ 65 years for both PN and PP were COPD (24%, 27.4%), diabetes (23.9%, 24.5%) and renal disease (21.9%, 23.9%) respectively. In adults ≥ 65 years, 64.2% with PN and 66.5% with PP had at least 1 of the investigated co-morbidities. Conclusion : PN remains a source of morbidity and mortality in the Spanish population, especially among young children and adults ≥ 65 years.