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Clinical and economic burden of invasive pneumococcal disease in adults: a multicenter hospital-based study

Authors
 Joon Young Song ; Jun Yong Choi ; Hee Jin Cheong ; Woo Joo Kim ; Kyung Hwa Park ; Jacob Lee ; Won Suk Choi ; Yu Mi Jo ; Jang Wook Sohn ; Young Keun Kim ; In-Gyu Bae ; Jin Soo Lee 
Citation
 BMC Infectious Diseases, Vol.13 : 202, 2013 
Journal Title
 BMC Infectious Diseases 
ISSN
 1471-2334 
Issue Date
2013
Abstract
BACKGROUND: Streptococcus pneumoniae causes a broad spectrum of illnesses ranging from mild upper respiratory tract infections to invasive pneumococcal disease (IPD). Quantitative data on the burden of pneumococcal disease, important for the establishment of appropriate vaccination strategies, is currently lacking in adults. METHODS: This multicenter, retrospective cohort study was designed to estimate the clinical and economic burden of IPD in adults over the last decade. Data were collected from patients with IPD at 10 university hospitals in South Korea. We estimated the proportion of IPD among all hospitalized patients, the case fatality rate, and the direct medical costs of IPD. Data were further analyzed according to age and risk groups. RESULTS: During the study period, 970 patients with IPD were identified. The mean age for all patients was 60.9 years; patients aged 50-64 years (33.0%) were most numerous, followed by those aged 65-74 years (27.4%). Overall, the proportion of IPD was 0.36 cases/1000 hospitalized patients and the case fatality rate was 30.9%, which increased significantly with age (p < 0.01). The mean direct medical costs were estimated to be US $7,452 without a difference between age and risk groups. On multivariate analysis, old age, advanced ECOG performance status, bacteremic pneumonia, and nosocomial infection were independent risk factors of 30-day case fatality. CONCLUSIONS: The clinical disease burden of IPD increased significantly with age and direct medical costs from IPD were substantial, regardless of age and co-morbid conditions. The current age-based vaccination strategy appears to be appropriate.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/86782
DOI
10.1186/1471-2334-13-202
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Internal Medicine
Yonsei Authors
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