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      Increasing Hospital Admissions for Pneumonia, England

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          Abstract

          This rise in recorded incidence from 2001 to 2005 was particularly marked among the elderly.

          Abstract

          Pneumonia is an important cause of illness and death in England. To describe trends in pneumonia hospitalizations, we extracted information on all episodes of pneumonia that occurred from April 1997 through March 2005 recorded in the Hospital Episode Statistics (HES) database by searching for International Classification of Diseases 10th revision codes J12–J18 in any diagnostic field. The age-standardized incidence of hospitalization with a primary diagnosis of pneumonia increased by 34% from 1.48 to 1.98 per 1,000 population between 1997–98 and 2004–05. The increase was more marked in older adults, in whom the mortality rate was also highest. The proportion of patients with recorded coexisting conditions (defined by using the Charlson Comorbidity Index score) increased over the study period. The rise in pneumonia hospital admissions was not fully explained by demographic change or increasing coexisting conditions. It may be attributable to other population factors, changes in HES coding, changes to health service organization, other biologic phenomenon, or a combination of these effects.

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          Etiology of community-acquired pneumonia: impact of age, comorbidity, and severity.

          M Marcos, F Arancibia, Ma Murcia … (1999)
          The aim of this study was to determine the etiology of community-acquired pneumonia (CAP) and the impact of age, comorbidity, and severity on microbial etiologies of such pneumonia. Overall, 395 consecutive patients with CAP were studied prospectively during a 15-mo period. Regular microbial investigation included examination of sputum, blood culture, and serology. Sampling of pleural fluid, transthoracic puncture, tracheobronchial aspiration, and protected specimen brush (PSB) sampling were performed in selected patients. The microbial etiology was determined in 182 of 395 (46%) cases, and 227 pathogens were detected. The five most frequent pathogens were Streptococcus pneumoniae (65 patients [29%]), Haemophilus influenzae (25 patients [11%]), Influenza virus A and B (23 patients [10%]), Legionella sp. (17 patients [8%]), and Chlamydia pneumoniae (15 patients [7%]). Gram-negative enteric bacilli (GNEB) accounted for 13 cases (6%) and Pseudomonas aeruginosa for 12 cases of pneumonia (5%). Patients aged < 60 yr were at risk for an "atypical" bacterial etiology (odds ratio [OR]: 2.3; 95% confidence interval [CI]: 1.2 to 4.5), especially Mycoplasma pneumoniae (OR: 5.3; 95% CI: 1.7 to 16.8). Comorbid pulmonary, hepatic, and central nervous illnesses, as well as current cigarette smoking and alcohol abuse, were all associated with distinct etiologic patterns. Pneumonia requiring admission to the intensive care unit was independently associated with the pathogens S. pneumoniae (OR: 2.5; 95% CI: 1.3 to 4.7), gram-negative enteric bacilli, and P. aeruginosa (OR: 2.5; 95% CI: 0.99 to 6.5). Clinical and radiographic features of "typical" pneumonia were neither sensitive nor specific for the differentiation of pneumococcal and nonpneumococcal etiologies. These results support a management approach based on the associations between etiology and age, comorbidity, and severity, instead of the traditional syndromic approach to CAP.
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            Trends in hospitalizations for pneumonia among persons aged 65 years or older in the United States, 1988-2002.

            Alicia M Fry, Aaron T. Curns, Melissa L. Anderson … (2005)
            Pneumonia causes significant mortality and morbidity among persons aged 65 years or older. However, few studies have explored trends according to age groups, which may affect intervention strategies. To examine trends in hospitalizations for pneumonia among persons aged 65 years or older and to compare characteristics, outcomes, and comorbid diagnoses. Data from 1988 through 2002 on pneumonia and comorbid diagnoses among patients aged 65 to 74 years, 75 to 84 years, and 85 years or older from the National Hospital Discharge Survey. Hospitalization rates by first-listed and any-listed discharge codes for pneumonia; proportions of hospitalizations reporting comorbid diagnoses for the 3 age groups (65-74 years, 75-84 years, > or =85 years). Hospitalization rates by both first-listed and any-listed discharge codes for pneumonia increased by 20% from 1988-1990 to 2000-2002 for patients aged 65 to 74 years (P = .01) and for patients aged 75 to 84 years (P<.001). Rates of hospitalization for pneumonia were 2-fold higher for patients aged 85 years or older (51 per 1000 population for first-listed discharge code of pneumonia; 95% confidence interval [CI], 46-55 per 1000 population) than among patients aged 75 to 84 years (26 per 1000 population; 95% CI, 24-28 per 1000 population), but did not significantly increase from 1988-1990 to 2000-2002. The proportion of patients aged 65 years or older diagnosed with pneumonia and a chronic cardiac disease, chronic pulmonary disease, or diabetes mellitus increased from 66% (SE, 1.0%) in 1988-1990 to 77% (SE, 0.8%) in 2000-2002. The risk of death during a hospitalization for pneumonia compared with the risk of death during a hospital stay for the 10 other most frequent causes of hospitalization was 1.5 (95% CI, 1.4-1.7) and remained constant from 1988-1990 to 2000-2002. Hospitalization rates for pneumonia have increased among US adults aged 64 to 74 years and aged 75 to 84 years during the past 15 years. Among those aged 85 years or older, at least 1 in 20 patients were hospitalized each year due to pneumonia. Concomitantly, the proportion of comorbid chronic diseases has increased. Efforts to prevent pneumonia should include reducing preventable comorbid conditions and improving vaccine effectiveness and vaccination programs in elderly persons.
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              Direct and indirect effects of routine vaccination of children with 7-valent pneumococcal conjugate vaccine on incidence of invasive pneumococcal disease--United States, 1998-2003.

              (2005)
              Streptococcus pneumoniae (pneumococcus) is a leading cause of pneumonia and meningitis in the United States and disproportionately affects young children and the elderly. In 2000, a 7-valent pneumococcal conjugate vaccine (PCV7) was licensed in the United States for routine use in children aged <5 years. Surveillance data from 2001 and 2002 indicated substantial declines in invasive pneumococcal disease (IPD) in children and adults compared with prevaccine years . This report updates assessment of the impact of PCV7 on IPD through 2003 by using population-based data from the Active Bacterial Core surveillance (ABCs) of the Emerging Infections Program Network, a cooperative surveillance program conducted by several state health departments and CDC. The results of this analysis indicated that 1) routine vaccination of young children with PCV7 continued to result in statistically significant declines in incidence of IPD through 2003 in the age group targeted for vaccination and among older children and adults, 2) the vaccine prevented more than twice as many IPD cases in 2003 through indirect effects on pneumococcal transmission (i.e., herd immunity) than through its direct effect of protecting vaccinated children, and 3) increases in disease caused by pneumococcal serotypes not included in the vaccine (i.e., replacement disease) occurred in certain populations but were small compared with overall declines in vaccine-serotype disease. Ongoing surveillance is needed to assess whether reductions in vaccine-serotype IPD are sustained and whether replacement disease will erode the substantial benefits of routine vaccination.
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                Author and article information

                Journal
                Journal ID (nlm-ta): Emerg Infect Dis
                Journal ID (publisher-id): EID
                Title: Emerging Infectious Diseases
                Publisher: Centers for Disease Control and Prevention
                ISSN (Print): 1080-6040
                ISSN (Electronic): 1080-6059
                Publication date (Print): May 2008
                Volume: 14
                Issue: 5
                Pages: 727-733
                Affiliations
                [* ]University of Bristol, Bristol, UK
                [† ]Health Protection Agency, Stonehouse, Gloucestershire, UK
                [‡ ]Health Protection Agency Centre for Infections, London, UK
                Author notes
                Address for correspondence: Caroline L. Trotter, University of Bristol, Canynge Hall, Whiteladies Rd, Bristol BS8 2PR, UK; email: caroline.trotter@ 123456bristol.ac.uk
                Article
                Publisher ID: 07-1011
                DOI: 10.3201/eid1405.071011
                PMC ID: 2600241
                PubMed ID: 18439353
                SO-VID: 06afa94d-9042-4c68-a75c-c6a7501bd107
                History
                Categories
                Subject: Research

                ScienceOpen disciplines: Infectious disease & Microbiology
                Keywords: pneumonia,trends,patient admission,hospital,england,epidemiology,research
                Data availability:
                ScienceOpen disciplines: Infectious disease & Microbiology
                Keywords: pneumonia, trends, patient admission, hospital, england, epidemiology, research

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