id author title date pages extension mime words sentences flesch summary cache txt cord-295201-u2dola34 Morimoto, Konosuke The Burden and Etiology of Community-Onset Pneumonia in the Aging Japanese Population: A Multicenter Prospective Study 2015-03-30 .txt text/plain 5393 308 45 This study was conducted to elucidate the burden of community-onset pneumonia (COP) and its etiologic fractions in Japan, the world's most aged society. All pneumonia patients aged ≥15 years, including those with community-acquired pneumonia (CAP) and health care-associated pneumonia (HCAP), were enrolled at four community hospitals on four major islands. The age-group specific incidence rates of pneumonia, hospitalization and death in the four prefectures were estimated using the surveillance data and the national statistics. Assuming that these proportions of pneumonia etiologies were constant across all prefectures, the estimated annual number of COP in the entire Japanese adult population was 1,880,000; of these, 1,300,000 cases (70%) occurred in people aged !65 years (Fig 2) . The burden was particularly high among the elderly population; 85.8% of aspiration-associated pneumonia cases occurred in patients aged !65 years. Incidence of community-acquired lower respiratory tract infections and pneumonia among older adults in the United Kingdom: a population-based study ./cache/cord-295201-u2dola34.txt ./txt/cord-295201-u2dola34.txt