R. Kvåle and H. Flaatten, Changes in intensive care from 1987 to 1997 ??? has outcome improved? A single centre study, Intensive Care Medicine, vol.28, issue.8, pp.1110-1116, 2002.
DOI : 10.1007/s00134-002-1378-3

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, 2009.
DOI : 10.1097/CCM.0b013e31819da98e

G. Ihra, J. Lehberger, P. Bauer, R. Schmutz, B. Metnitz et al., Development of demographics and outcome of very old critically ill patients admitted to intensive care units, Intensive Care Medicine, vol.31, issue.4, pp.620-626, 2012.
DOI : 10.1007/s00134-012-2474-7

A. Boumendil, E. Maury, R. I. Luquel, L. Offenstadt, G. Guidet et al., Prognosis of patients aged 80???years and over admitted in medical intensive care unit, Intensive Care Medicine, vol.30, issue.4, pp.647-654, 2004.
DOI : 10.1007/s00134-003-2150-z

S. De-rooij, A. Govers, J. Korevaar, A. Abu-hanna, M. Levi et al., Short-term and long-term mortality in very elderly patients admitted to an intensive care unit, Intensive Care Medicine, vol.301, issue.7, pp.1039-1044, 2006.
DOI : 10.1007/s00134-006-0171-0

E. Sacanella, J. Pérez-castejon, J. Nicolas, F. Masanés, M. Navarro et al., Mortality in healthy elderly patients after ICU admission, Intensive Care Medicine, vol.56, issue.3, pp.550-555, 2009.
DOI : 10.1007/s00134-008-1345-8

A. Boumendil, D. Angus, A. Guitonneau, A. Menn, C. Ginsburg et al., ICE-CUB study group (2012) Variability of intensive care admission decisions for the very elderly, PLoS One, vol.7

C. Sprung, M. Danis, G. Iapichino, A. Artigas, J. Kesecioglu et al., Triage of intensive care patients: identifying agreement and controversy, Intensive Care Medicine, vol.35, issue.11, pp.1916-1924, 2013.
DOI : 10.1007/s00134-013-3033-6

L. Fuchs, C. Chronaki, S. Park, V. Novack, Y. Baumfeld et al., ICU admission characteristics and mortality rates among elderly and very elderly patients, Intensive Care Medicine, vol.56, issue.Suppl, pp.1654-1661, 2012.
DOI : 10.1007/s00134-012-2629-6

L. Orwelius, A. Nordlund, P. Nordlund, E. Simonsson, C. Bäckman et al., Pre-existing disease: the most important factor for health related quality of life long-term after critical illness: a prospective, longitudinal, multicentre trial, R67. doi: 10.1186/cc8967 Prevalence and impact of frailty on mortality in elderly ICU patients: a prospective, multicenter observational study, 2010.
DOI : 10.1186/cc8967

D. D. Rennes, Anesthésie Réanimation Département d'Anesthésie Réanimation Département d'Anesthésie Réanimation, Anesthésie Réanimation Inserm Eri, vol.23, issue.5 6 9

S. Philippe and M. , Service d'Anesthésie-Réanimation 1

L. Fried, C. Tangen, and J. Walston, Frailty in Older Adults: Evidence for a Phenotype, The Journals of Gerontology Series A: Biological Sciences and Medical Sciences, vol.56, issue.3, pp.146-156, 2001.
DOI : 10.1093/gerona/56.3.M146

J. Avila-funes, C. Helmer, and H. Amieva, Frailty Among Community-Dwelling Elderly People in France: The Three-City Study, The Journals of Gerontology Series A: Biological Sciences and Medical Sciences, vol.63, issue.10, pp.1089-1096, 2008.
DOI : 10.1093/gerona/63.10.1089

URL : https://hal.archives-ouvertes.fr/inserm-00336493