%0 Journal Article %A S Y Man %A C A Graham %A S S W Chan %A P S K Mak %A A H Y Yu %A C S K Cheung %A P S Y Cheung %A G Lui %A N Lee %A M Chan %A M Ip %A T H Rainer %T Disease severity prediction for nursing home-acquired pneumonia in the emergency department %D 2011 %R 10.1136/emj.2010.107235 %J Emergency Medicine Journal %P 1046-1050 %V 28 %N 12 %X Background Prediction rules exist for the assessment of community-acquired pneumonia but their use in nursing home-acquired pneumonia (NHAP) remains undefined. The objectives of this study were to compare the prognostic ability for severe NHAP of five prediction rules (PSI, CURB-65, M-ATS, R-ATS, España rule), and to evaluate their usefulness to identify patients with less severe disease in the emergency department for outpatient care.Methods A prospective observational study of consecutive NHAP patients was conducted at a university teaching hospital emergency department in Hong Kong between January 2004 and June 2005. The primary outcome was severe pneumonia (defined as combined 30-day mortality and/or intensive care unit (ICU) admission).Results 767 consecutive NHAP patients were included. Mean (SD) age was 83.4 (9.0) years; 350 (45.6%) were male and 644 (84.0%) had coexisting illness. 95 patients died within 30 days (12.4%), five patients were admitted to the ICU (0.7%) and 98 patients had severe pneumonia (12.8%). Sensitivity and specificity of each decision rule ranged from 37.8% to 95.9% and 15.1% to 87.6% respectively. The overall predictive performance of each rule was between 0.627 and 0.712. The negative likelihood ratios of PSI (0.27) and CURB-65 (0.23) were lower than M-ATS (0.71), R-ATS (0.45) and España (0.39). After excluding 204 patients with either poor functional status or those >90 years of age, sensitivities of M-ATS (96.0%) and R-ATS (100%) improved greatly with negative likelihood ratios of <0.1.Conclusion PSI and CURB-65 are useful for identification of patients with less severe NHAP. %U https://emj.bmj.com/content/emermed/28/12/1046.full.pdf