• 1
    Heron M, Hoyert DL, Murphy SL et al. Deaths: final data for 2006. Natl. Vital. Stat. Rep. 2009; 57: 1134.
  • 2
    Armstrong GL, Conn LA, Pinner RW. Trends in infectious disease mortality in the United States during the 20th century. JAMA 1999; 281: 616.
  • 3
    Singanayagam A, Chalmers JD, Hill AT. Severity assessment in community-acquired pneumonia: a review. QJM 2009; 102: 37988.
  • 4
    Marston BJ, Plouffe JF, File TM Jr. et al. Incidence of community-acquired pneumonia requiring hospitalization. Results of a population-based active surveillance Study in Ohio. The Community-Based Pneumonia Incidence Study Group. Arch. Intern. Med. 1997; 157: 170918.
  • 5
    Mandell LA, Wunderink RG, Anzueto A et al. Infectious Diseases Society of America/American Thoracic Society consensus guidelines on the management of community-acquired pneumonia in adults. Clin. Infect. Dis. 2007; 44(Suppl. 2): S2772.
  • 6
    Bartolome M, Almirall J, Morera J et al. A population-based study of the costs of care for community-acquired pneumonia. Eur. Respir. J. 2004; 23: 6106.
  • 7
    Hook EW 3rd, Horton CA, Schaberg DR. Failure of intensive care unit support to influence mortality from pneumococcal bacteremia. JAMA 1983; 249: 10557.
  • 8
    Ewig S, Bauer T, Hasper E et al. Prognostic analysis and predictive rule for outcome of hospital-treated community-acquired pneumonia. Eur. Respir. J. 1995; 8: 3927.
  • 9
    Woodhead M, Welch CA, Harrison DA et al. Community-acquired pneumonia on the intensive care unit: secondary analysis of 17,869 cases in the ICNARC case mix programme database. Crit. Care 2006; 10(Suppl. 2): S1.
  • 10
    Leroy O, Santre C, Beuscart C et al. A five-year study of severe community-acquired pneumonia with emphasis on prognosis in patients admitted to an intensive care unit. Intensive Care Med. 1995; 21: 2431.
  • 11
    Shmueli A, Sprung CL. Assessing the in-hospital survival benefits of intensive care. Int. J. Technol. Assess. Health Care 2005; 21: 6672.
  • 12
    Sprung CL, Geber D, Eidelman LA et al. Evaluation of triage decisions for intensive care admission. Crit. Care Med. 1999; 27: 10739.
  • 13
    Simchen E, Sprung CL, Galai N et al. Survival of critically ill patients hospitalized in and out of intensive care. Crit. Care Med. 2007; 35: 44957.
  • 14
    Lisboa T, Blot S, Waterer GW et al. Radiologic progression of pulmonary infiltrates predicts a worse prognosis in severe community-acquired pneumonia than bacteremia. Chest 2009; 135: 16572.
  • 15
    Roson B, Carratala J, Fernandez-Sabe N et al. Causes and factors associated with early failure in hospitalized patients with community-acquired pneumonia. Arch. Intern. Med. 2004; 164: 5028.
  • 16
    Renaud B, Santin A, Coma E et al. Association between timing of intensive care unit admission and outcomes for emergency department patients with community-acquired pneumonia. Crit. Care Med. 2009; 37: 286774.
  • 17
    Phua J, Ngerng WJ, Lim TK. The impact of a delay in intensive care unit admission for community-acquired pneumonia. Eur. Respir. J. 2010; 36: 82633.
  • 18
    Restrepo MI, Mortensen EM, Rello J et al. Late admission to the ICU in patients with community-acquired pneumonia is associated with higher mortality. Chest 2010; 137: 5527.
  • 19
    Brown SM, Jones BE, Jephson AR et al. Validation of the Infectious Disease Society of America/American Thoracic Society 2007 guidelines for severe community-acquired pneumonia. Crit. Care Med. 2009; 37: 30106.
  • 20
    Dean NC, Bateman KA. Local guidelines for community-acquired pneumonia: development, implementation, and outcome studies. Infect. Dis. Clin. North Am. 2004; 18: 97591.
  • 21
    Dean NC, Silver MP, Bateman KA et al. Decreased mortality after implementation of a treatment guideline for community-acquired pneumonia. Am. J. Med. 2001; 110: 4517.
  • 22
    Dean NC, Jones JP, Aronsky D et al. Hospital admission decision for patients with community-acquired pneumonia: variability among physicians in an emergency department. Ann. Emerg. Med. 2012; 59: 3541.
  • 23
    Aronsky D, Haug PJ, Lagor C et al. Accuracy of administrative data for identifying patients with pneumonia. Am. J. Med. Qual. 2005; 20: 31928.
  • 24
    Aronsky D, Kasworm E, Jacobson JA et al. Electronic screening of dictated reports to identify patients with do-not-resuscitate status. J. Am. Med. Inform. Assoc. 2004; 11: 4039.
  • 25
    Charles PG, Wolfe R, Whitby M et al. SMART-COP: a tool for predicting the need for intensive respiratory or vasopressor support in community-acquired pneumonia. Clin. Infect. Dis. 2008; 47: 37584.
  • 26
    Le Gall JR, Lemeshow S, Saulnier F. A new simplified acute physiology score (SAPS II) based on a European/North American multicenter study. JAMA 1993; 270: 295763.
  • 27
    Jencks SF, Williams DK, Kay TL. Assessing hospital-associated deaths from discharge data. The role of length of stay and comorbidities. JAMA 1988; 260: 22406.
  • 28
    Fine MJ, Auble TE, Yealy DM et al. A prediction rule to identify low-risk patients with community-acquired pneumonia. N. Engl. J. Med. 1997; 336: 24350.
  • 29
    Jencks SF, Daley J, Draper D et al. Interpreting hospital mortality data. The role of clinical risk adjustment. JAMA 1988; 260: 36116.
  • 30
    Mortensen EM, Coley CM, Singer DE et al. Causes of death for patients with community-acquired pneumonia: results from the pneumonia patient outcomes research team cohort study. Arch. Intern. Med. 2002; 162: 105964.
  • 31
    Skolnick M. The Utah genealogical database: a resource for genetic epidemiology. In: Cairns JL, Lyon JL, Skolnick M (eds) Banbury Report No 4; Cancer Incidence in Defined Populations. Cold Spring Harbor Laboratory, New York, 1980; 28597.
  • 32
    Kurth T, Walker AM, Glynn RJ et al. Results of multivariable logistic regression, propensity matching, propensity adjustment, and propensity-based weighting under conditions of nonuniform effect. Am. J. Epidemiol. 2006; 163: 26270.
  • 33
    D'Agostino RB Jr. Propensity score methods for bias reduction in the comparison of a treatment to a non-randomized control group. Stat. Med. 1998; 17: 226581.
  • 34
    Stone RA, Obrosky DS, Singer DE et al. Propensity score adjustment for pretreatment differences between hospitalized and ambulatory patients with community-acquired pneumonia. Pneumonia Patient Outcomes Research Team (PORT) Investigators. Med. Care 1995; 33: AS5666.
  • 35
    Team RDC. R: A Language and Environment for Statistical Computing. R Foundation for Statistical Computing, Vienna, 2009.
  • 36
    Liapikou A, Ferrer M, Polverino E et al. Severe community-acquired pneumonia: validation of the Infectious Diseases Society of America/American Thoracic Society guidelines to predict an intensive care unit admission. Clin. Infect. Dis. 2009; 48: 37785.
  • 37
    Phua J, See KC, Chan YH et al. Validation and clinical implications of the IDSA/ATS minor criteria for severe community-acquired pneumonia. Thorax 2009; 64: 598603.
  • 38
    Rello J, Lisboa T, Lujan M et al. Severity of pneumococcal pneumonia associated with genomic bacterial load. Chest 2009; 136: 83240.
  • 39
    Sakr Y, Vincent JL, Schuerholz T et al. Early-versus late-onset shock in European intensive care units. Shock 2007; 28: 63643.
  • 40
    Roman-Marchant O, Orellana-Jimenez CE, De Backer D et al. Septic shock of early or late onset: does it matter? Chest 2004; 126: 1738.
  • 41
    Angus DC, Marrie TJ, Obrosky DS et al. Severe community-acquired pneumonia: use of intensive care services and evaluation of American and British Thoracic Society Diagnostic criteria. Am. J. Respir. Crit. Care Med. 2002; 166: 71723.
  • 42
    Roson B, Carratala J, Dorca J et al. Etiology, reasons for hospitalization, risk classes, and outcomes of community-acquired pneumonia in patients hospitalized on the basis of conventional admission criteria. Clin. Infect. Dis. 2001; 33: 15865.