D. Angus, M. Kelley, R. Schmitz, A. White, J. Popovich et al., Caring for the critically ill patient. Current and projected workforce requirements for care of the critically ill and patients with pulmonary disease: can we meet the requirements of an aging population, pp.2842762-2770, 2000.

S. Bagshaw, S. Webb, A. Delaney, C. George, D. Pilcher et al., Very old patients admitted to intensive care in Australia and New Zealand: a multi-centre cohort analysis, Critical Care, vol.13, issue.2, p.45, 2009.
DOI : 10.1186/cc7768

H. Wunsch, D. Angus, D. Harrison, O. Collange, R. Fowler et al., Variation in critical care services across North America and Western Europe*, Critical Care Medicine, vol.36, issue.10, pp.2787-2793, 2008.
DOI : 10.1097/CCM.0b013e318186aec8

D. Angus and R. Wax, Epidemiology of sepsis: An update, Critical Care Medicine, vol.29, issue.7, pp.109-116, 2001.
DOI : 10.1097/00003246-200107001-00035

S. Blot, M. Cankurtaran, M. Petrovic, D. Vandijck, C. Lizy et al., Epidemiology and outcome of nosocomial bloodstream infection in elderly critically ill patients: A comparison between middle-aged, old, and very old patients*, Critical Care Medicine, vol.37, issue.5, pp.1634-1641, 2009.
DOI : 10.1097/CCM.0b013e31819da98e

J. Rasmussen, S. Rasmussen, G. Gislason, S. Abildstrom, T. Schramm et al., Persistent socio-economic differences in revascularization after acute myocardial infarction despite a universal health care system-a Danish study. Cardiovasc Drugs Ther, pp.449-457, 2007.

M. Garrouste-orgeas, A. Boumendil, D. Pateron, P. Aergerter, D. Somme et al., Selection of intensive care unit admission criteria for patients aged 80 years and over and compliance of emergency and intensive care unit physicians with the selected criteria: An observational, multicenter, prospective study*, Critical Care Medicine, vol.37, issue.11, pp.372919-2928, 2009.
DOI : 10.1097/CCM.0b013e3181b019f0

H. Nguyen, J. Saczynski, J. Gore, and R. Goldberg, Age and Sex Differences in Duration of Prehospital Delay in Patients With Acute Myocardial Infarction: A Systematic Review, Circulation: Cardiovascular Quality and Outcomes, vol.3, issue.1, pp.82-92, 2010.
DOI : 10.1161/CIRCOUTCOMES.109.884361

A. Schoenenberger, D. Radovanovic, J. Stauffer, S. Windecker, P. Urban et al., Age-Related Differences in the Use of Guideline-Recommended Medical and Interventional Therapies for Acute Coronary Syndromes: A Cohort Study, Journal of the American Geriatrics Society, vol.153, issue.3, pp.510-516, 2008.
DOI : 10.1111/j.1532-5415.2007.01589.x

N. Lerolle, L. Trinquart, C. Bornstain, J. Tadie, A. Imbert et al., Increased intensity of treatment and decreased mortality in elderly patients in an intensive care unit over a decade*, Critical Care Medicine, vol.38, issue.1, pp.59-64
DOI : 10.1097/CCM.0b013e3181b088ec

R. Fowler, N. Sabur, P. Li, D. Juurlink, R. Pinto et al., Sex-and age-based differences in the delivery and outcomes of critical care, Canadian Medical Association Journal, vol.177, issue.12, pp.1771513-1519, 2007.
DOI : 10.1503/cmaj.071112

A. Blomkalns, A. Chen, J. Hochman, E. Peterson, K. Trynosky et al., Gender Disparities in the Diagnosis and Treatment of Non-ST-segment Elevation Acute Coronary Syndromes: Large-scale Observations From the CRUSADE (Can Rapid Risk Stratification of Unstable Angina Patients Suppress Adverse Outcomes With Early Implementation of the American College of Cardiology/American Heart Association Guidelines) National Quality Improvement Initiative, ACC Current Journal Review, vol.14, issue.7, pp.45832-837, 2005.
DOI : 10.1016/j.accreview.2005.06.007

S. De-rooij, A. Govers, J. Korevaar, A. Giesbers, M. Levi et al., Cognitive, Functional, and Quality-of-Life Outcomes of Patients Aged 80 and Older Who Survived at Least 1 Year After Planned or Unplanned Surgery or Medical Intensive Care Treatment, Journal of the American Geriatrics Society, vol.42, issue.5, pp.56816-822, 2008.
DOI : 10.1111/j.1532-5415.2008.01671.x

A. Tabah, F. Philippart, J. Timsit, V. Willems, A. Francais et al., Quality of life in patients aged 80 or over after ICU discharge, Critical Care, vol.14, issue.1, p.2, 2010.
DOI : 10.1186/cc8231

URL : https://hal.archives-ouvertes.fr/inserm-00663775

A. Roch, S. Wiramus, V. Pauly, J. Forel, C. Guervilly et al., Long-term outcome in medical patients aged 80 or over following admission to an intensive care unit, Critical Care, vol.15, issue.1, p.36, 2011.
DOI : 10.1186/cc9984

A. Boumendil, D. Angus, A. Guitonneau, A. Menn, C. Ginsburg et al., Determinants and outcome of intensive care unit admission of very elderly patients in France: a multicenter cohort study, p.178, 2009.

A. Barnato, S. Albert, D. Angus, J. Lave, and H. Degenholtz, Disability among Elderly Survivors of Mechanical Ventilation, American Journal of Respiratory and Critical Care Medicine, vol.183, issue.8, pp.1037-1042, 2011.
DOI : 10.1164/rccm.201002-0301OC

S. Desai, T. Law, and D. Needham, Long-term complications of critical care, Critical Care Medicine, vol.39, issue.2, pp.371-379, 2011.
DOI : 10.1097/CCM.0b013e3181fd66e5

B. Cuthbertson, S. Roughton, D. Jenkinson, G. Maclennan, and L. Vale, Quality of life in the five years after intensive care: a cohort study, Critical Care, vol.14, issue.1, p.6, 2010.
DOI : 10.1186/cc8848

M. Unroe, J. Kahn, S. Carson, J. Govert, T. Martinu et al., One-Year Trajectories of Care and Resource Utilization for Recipients of Prolonged Mechanical Ventilation, Annals of Internal Medicine, vol.153, issue.3, pp.167-75, 2010.
DOI : 10.7326/0003-4819-153-3-201008030-00007

H. Wunsch, C. Guerra, A. Barnato, D. Angus, G. Li et al., Threeyear outcomes for Medicare beneficiaries who survive intensive care, JAMA, vol.2010, issue.3039, pp.849-56

H. Wunsch, D. Angus, D. Harrison, W. Linde-zwirble, and K. Rowan, Comparison of Medical Admissions to Intensive Care Units in the United States and United Kingdom, American Journal of Respiratory and Critical Care Medicine, vol.183, issue.12, pp.1831666-1673, 2011.
DOI : 10.1164/rccm.201012-1961OC

H. Wunsch, Y. Nguyen, and D. Angus, Smoothing the way: improving admission to discharge from the ICU. In Organization and Management of Intensive Care. European Society of Intensive Care Medicine edn

. Nguyen, Annals of Intensive Care, p.2929, 2011.

H. Flatten, R. Moreno, C. Putensen, and A. Rhodes, Medizinisch Wissenschaftliche Verlagsgesellschaft, pp.269-276

E. Mercier, B. Giraudeau, G. Ginies, D. Perrotin, and P. Dequin, Iatrogenic events contributing to ICU admission: a prospective study, Intensive Care Medicine, vol.266, issue.6, pp.1033-1040, 2010.
DOI : 10.1007/s00134-010-1793-9

M. Pisani, T. Murphy, K. Araujo, V. Ness, and P. , Factors associated with persistent delirium after intensive care unit admission in an older medical patient population, Journal of Critical Care, vol.25, issue.3, pp.540-541, 2010.
DOI : 10.1016/j.jcrc.2010.02.009

M. Herridge, Legacy of intensive care unit-acquired weakness, Critical Care Medicine, vol.37, pp.457-461, 2009.
DOI : 10.1097/CCM.0b013e3181b6f35c

T. Girard, J. Jackson, P. Pandharipande, B. Pun, J. Thompson et al., Delirium as a predictor of long-term cognitive impairment in survivors of critical illness, Critical Care Medicine, vol.38, issue.7, pp.381513-1520, 2010.
DOI : 10.1097/CCM.0b013e3181e47be1

A. Boumendil, A. Latouche, and B. Guidet, On the Benefit of Intensive Care for Very Old Patients, Archives of Internal Medicine, vol.171, issue.12, pp.1116-1117, 2011.
DOI : 10.1001/archinternmed.2011.102

M. Martinez-selles, T. Datino, and H. Bueno, Coronary care unit admission of very old patients with acute myocardial infarction, Heart, vol.92, issue.4, pp.549-550, 2006.
DOI : 10.1136/hrt.2005.072041

C. Boyd, C. Landefeld, S. Counsell, R. Palmer, R. Fortinsky et al., Recovery of Activities of Daily Living in Older Adults After Hospitalization for Acute Medical Illness, Journal of the American Geriatrics Society, vol.50, issue.12, pp.562171-2179, 2008.
DOI : 10.1111/j.1532-5415.2008.02023.x

C. Landefeld, R. Palmer, D. Kresevic, R. Fortinsky, and J. Kowal, A Randomized Trial of Care in a Hospital Medical Unit Especially Designed to Improve the Functional Outcomes of Acutely Ill Older Patients, New England Journal of Medicine, vol.332, issue.20, pp.3321338-1344, 1995.
DOI : 10.1056/NEJM199505183322006

R. Kane, Finding the right level of posthospital care We didn't realize there was any other option for him, JAMA, vol.2011, issue.3053, pp.284-293

N. Ahmed and S. Pearce, Acute Care for the Elderly: A Literature Review, Population Health Management, vol.13, issue.4, pp.219-225, 2010.
DOI : 10.1089/pop.2009.0058

A. Boumendil, D. Somme, M. Garrouste-orgeas, and B. Guidet, Should elderly patients be admitted to the intensive care unit? Intensive Care Med, pp.1252-1262, 2007.

W. Sligl, D. Eurich, T. Marrie, and S. Majumdar, Age still matters: Prognosticating short- and long-term mortality for critically ill patients with pneumonia, Critical Care Medicine, vol.38, issue.11, pp.2126-2132, 2010.
DOI : 10.1097/CCM.0b013e3181eedaeb

J. Farfel, S. Franca, S. Mdo, C. Filho, W. Carvalho et al., Age, invasive ventilatory support and outcomes in elderly patients admitted to intensive care units, Age and Ageing, vol.38, issue.5, pp.515-520, 2009.
DOI : 10.1093/ageing/afp119

T. Gill, H. Allore, E. Gahbauer, and T. Murphy, Change in Disability After Hospitalization or Restricted Activity in Older Persons, JAMA, vol.304, issue.17, pp.1919-1928
DOI : 10.1001/jama.2010.1568

T. Iwashyna, E. Ely, D. Smith, and K. Langa, Long-term Cognitive Impairment and Functional Disability Among Survivors of Severe Sepsis, JAMA, vol.304, issue.16, pp.1787-1794
DOI : 10.1001/jama.2010.1553

S. Yende, D. Angus, I. Ali, G. Somes, A. Newman et al., Influence of Comorbid Conditions on Long-Term Mortality After Pneumonia in Older People, Journal of the American Geriatrics Society, vol.3, issue.4, pp.518-525, 2007.
DOI : 10.1111/j.1532-5415.2007.01100.x

D. Mohan and D. Angus, Thought outside the box: Intensive care unit freakonomics and decision making in the intensive care unit, Critical Care Medicine, vol.38, pp.637-641, 2010.
DOI : 10.1097/CCM.0b013e3181f202c3

A. Rodriguez-molinero, M. Lopez-dieguez, A. Tabuenca, J. De-la-cruz, and J. Banegas, Physicians' impression on the elders' functionality influences decision making for emergency care, The American Journal of Emergency Medicine, vol.28, issue.7, pp.28757-765, 2010.
DOI : 10.1016/j.ajem.2009.03.016

. Nguyen, The challenge of admitting the very elderly to intensive care Annals of Intensive Care 2011 1:29. Submit your manuscript to a journal and benefi t from: 7 Convenient online submission 7 Rigorous peer review 7 Immediate publication on acceptance 7 Open access: articles freely available online 7

. Nguyen, Annals of Intensive Care, p.2929, 2011.