R. Schoeni, L. Martin, P. Andreski, and V. Freedman, Persistent and Growing Socioeconomic Disparities in Disability Among the Elderly: 1982???2002, American Journal of Public Health, vol.95, issue.11, pp.2065-2070, 2005.
DOI : 10.2105/AJPH.2004.048744

M. Huisman, A. Kunst, and J. Mackenbach, Socioeconomic inequalities in morbidity among the elderly; a European overview, Social Science & Medicine, vol.57, issue.5, pp.861-873, 2003.
DOI : 10.1016/S0277-9536(02)00454-9

L. Ferrucci, F. Giallauria, and J. Guralnik, Epidemiology of Aging, Radiologic Clinics of North America, vol.46, issue.4, pp.643-52, 2008.
DOI : 10.1016/j.rcl.2008.07.005

M. Minkler, E. Fuller-thomson, and J. Guralnik, Gradient of Disability across the Socioeconomic Spectrum in the United States, New England Journal of Medicine, vol.355, issue.7, pp.695-703, 2006.
DOI : 10.1056/NEJMsa044316

E. Breeze, A. Fletcher, D. Leon, M. Marmot, R. Clarke et al., Do socioeconomic disadvantages persist into old age? Self-reported morbidity in a 29-year follow-up of the Whitehall Study, Am J Public Health, vol.91, issue.2, pp.277-283, 2001.

D. Melzer, T. Lan, and J. Guralnik, The predictive validity for mortality of the index of mobility-related limitation - results from the EPESE study, Age and Ageing, vol.32, issue.6, pp.619-625, 2003.
DOI : 10.1093/ageing/afg107

J. Guralnik, L. Ferrucci, C. Pieper, S. Leveille, K. Markides et al., Lower Extremity Function and Subsequent Disability: Consistency Across Studies, Predictive Models, and Value of Gait Speed Alone Compared With the Short Physical Performance Battery, The Journals of Gerontology Series A: Biological Sciences and Medical Sciences, vol.55, issue.4, pp.221-231, 2000.
DOI : 10.1093/gerona/55.4.M221

T. Chandola, J. Ferrie, A. Sacker, and M. Marmot, Social inequalities in self reported health in early old age: follow-up of prospective cohort study, BMJ, vol.334, issue.7601, pp.990-994, 2007.
DOI : 10.1136/bmj.39167.439792.55

M. Marmot and E. Brunner, Cohort Profile: The Whitehall II study, International Journal of Epidemiology, vol.34, issue.2, pp.251-256, 2005.
DOI : 10.1093/ije/dyh372

J. Guralnik, E. Simonsick, L. Ferrucci, R. Glynn, L. Berkman et al., A Short Physical Performance Battery Assessing Lower Extremity Function: Association With Self-Reported Disability and Prediction of Mortality and Nursing Home Admission, Journal of Gerontology, vol.49, issue.2, pp.85-94, 1994.
DOI : 10.1093/geronj/49.2.M85

H. Hemingway, A. Nicholson, M. Stafford, R. Roberts, and M. Marmot, The impact of socioeconomic status on health functioning as assessed by the SF-36 questionnaire: the Whitehall II Study., American Journal of Public Health, vol.87, issue.9, pp.1484-1490, 1997.
DOI : 10.2105/AJPH.87.9.1484

E. Brunner, M. Marmot, K. Nanchahal, M. Shipley, S. Stansfeld et al., Social inequality in coronary risk: Central obesity and the metabolic syndrome. Evidence from the Whitehall II study, Diabetologia, vol.35, issue.Suppl IV, pp.1341-1349, 1997.
DOI : 10.1007/s001250050830

K. Rennie, H. Hemingway, M. Kumari, E. Brunner, M. Malik et al., Effects of Moderate and Vigorous Physical Activity on Heart Rate Variability in a British Study of Civil Servants, American Journal of Epidemiology, vol.158, issue.2, pp.135-143, 2003.
DOI : 10.1093/aje/kwg120

A. Kunst and J. Mackenbach, The size of mortality differences associated with educational level in nine industrialized countries., American Journal of Public Health, vol.84, issue.6, pp.932-937, 1994.
DOI : 10.2105/AJPH.84.6.932

A. Stuck, J. Walthert, T. Nikolaus, C. Bula, C. Hohmann et al., Risk factors for functional status decline in community-living elderly people: a systematic literature review, Social Science & Medicine, vol.48, issue.4, pp.445-469, 1999.
DOI : 10.1016/S0277-9536(98)00370-0

A. Coppin, L. Ferrucci, F. Lauretani, C. Phillips, M. Chang et al., Low Socioeconomic Status and Disability in Old Age: Evidence From the InChianti Study for the Mediating Role of Physiological Impairments, The Journals of Gerontology Series A: Biological Sciences and Medical Sciences, vol.61, issue.1, pp.86-91, 2006.
DOI : 10.1093/gerona/61.1.86

A. Russo, G. Onder, M. Cesari, V. Zamboni, C. Barillaro et al., Lifetime occupation and physical function: a prospective cohort study on persons aged 80 years and older living in a community, Occupational and Environmental Medicine, vol.63, issue.7, pp.438-442, 2006.
DOI : 10.1136/oem.2005.023549

N. Rautio, E. Heikkinen, and S. Ebrahim, Socio-economic position and its relationship to physical capacity among elderly people living in Jyv??skyl??, Finland: five- and ten-year follow-up studies, Social Science & Medicine, vol.60, issue.11, pp.2405-2416, 2005.
DOI : 10.1016/j.socscimed.2004.11.029

R. Roberts, E. Brunner, I. White, and M. Marmot, Gender differences in occupational mobility and structure of employment in the British Civil Service, Social Science & Medicine, vol.37, issue.12, pp.1415-1425, 1993.
DOI : 10.1016/0277-9536(93)90175-4

Z. Zimmer and J. House, Education, income, and functional limitation transitions among American adults: contrasting onset and progression, International Journal of Epidemiology, vol.32, issue.6, pp.1089-1097, 2003.
DOI : 10.1093/ije/dyg254

J. Ferrie, M. Shipley, G. Davey-smith, S. Stansfeld, and M. Marmot, Future uncertainty and socioeconomic inequalities in health: the Whitehall II study, Social Science & Medicine, vol.57, issue.4, pp.637-646, 2003.
DOI : 10.1016/S0277-9536(02)00406-9

L. Berkman, T. Glass, I. Brissette, and T. Seeman, From social integration to health: Durkheim in the new millennium, Social Science & Medicine, vol.51, issue.6, pp.843-857, 2000.
DOI : 10.1016/S0277-9536(00)00065-4

J. House, Understanding Social Factors and Inequalities in Health: 20th Century Progress and 21st Century Prospects, Journal of Health and Social Behavior, vol.43, issue.2, pp.125-142, 2002.
DOI : 10.2307/3090192

J. Unger, G. Mcavay, M. Bruce, L. Berkman, and T. Seeman, Variation in the Impact of Social Network Characteristics on Physical Functioning in Elderly Persons: MacArthur Studies of Successful Aging, The Journals of Gerontology Series B: Psychological Sciences and Social Sciences, vol.54, issue.5, pp.245-251, 1999.
DOI : 10.1093/geronb/54B.5.S245

E. Brunner, M. Shipley, D. Blane, D. Smith, G. Marmot et al., When does cardiovascular risk start? Past and present socioeconomic circumstances and risk factors in adulthood, Journal of Epidemiology & Community Health, vol.53, issue.12, pp.757-764, 1999.
DOI : 10.1136/jech.53.12.757

M. Kumari, J. Head, and M. Marmot, Prospective Study of Social and Other Risk Factors for Incidence of Type 2 Diabetes in the Whitehall II Study, Archives of Internal Medicine, vol.164, issue.17, pp.1873-1880, 2004.
DOI : 10.1001/archinte.164.17.1873

P. Garg, K. Liu, L. Tian, J. Guralnik, L. Ferrucci et al., Activity During Daily Life and Functional Decline in Peripheral Arterial Disease. Circulation Nonresponse to baseline, non-response to follow-up and mortality in the Whitehall II cohort, Int J Epidemiol, issue.28, 2008.

A. Sacker, J. Head, and M. Bartley, Impact of Coronary Heart Disease on Health Functioning in an Aging Population: Are There Differences According to Socioeconomic Position?, Psychosomatic Medicine, vol.70, issue.2, pp.133-140, 2008.
DOI : 10.1097/PSY.0b013e3181642ef5

S. Volpato, A. Ble, E. Metter, F. Lauretani, S. Bandinelli et al., High-Density Lipoprotein Cholesterol and Objective Measures of Lower Extremity Performance in Older Nondisabled Persons: The InChianti Study, Journal of the American Geriatrics Society, vol.556, issue.(S, pp.621-629, 2008.
DOI : 10.1111/j.1532-5415.2007.01608.x

D. Kuh, R. Cooper, R. Hardy, J. Guralnik, and M. Richards, Lifetime Cognitive Performance is Associated With Midlife Physical Performance in a Prospective National Birth Cohort Study, Psychosomatic Medicine, vol.71, issue.1, 2009.
DOI : 10.1097/PSY.0b013e31818a1620