Socioeconomic status and heterogeneity in aging As people get older there is increasing heterogeneity in health and in physical, mental and cognitive functioning, resulting in age peers becoming more and more dissimilar from each other. Research on the determinants of this heterogeneity is crucial as positive health trajectories are related to higher quality of life, longer independence and considerably lower medical and social care costs. The Whitehall II study on 10,308 British civil servants was set up in 1985 and has played a crucial role in shaping the research agenda on social inequalities in health. Over the last 22 years participants, now aged 55-79 years, have been followed up with medical examinations at 5-year intervals and with questionnaire surveys every second or third year. Thus, Whitehall II is now primed to address one of the major challenges of the new millennium;determinants of heterogeneity in health in ageing populations. NIA support has been crucial to the addition and exploitation of functioning data in the Whitehall II study. As the participants age, this application seeks continued NIA support for further analysis of the data collected so far and to collect two more phases of data over the next 5 years. This support will enable us to address three overall aims. 1) Social inequalities in chronic diseases, mortality and functioning: To examine whether relative and absolute social inequalities in chronic diseases (coronary heart disease, stroke, diabetes) and mortality increase with age and to estimate the importance of biological, behavioral and psychosocial explanations of these inequalities. To examine the contribution of repeated measures of risk factors to contemporaneous, trajectory and accumulated risk models. To determine whether the consequences of disease on functioning differs or are moderated by socioeconomic status. 2) Cognitive changes in early old age: determinants and consequences: To examine the socioeconomic, vascular and behavioral determinants of heterogeneity in cognitive aging, starting in midlife, and to assess the consequences of cognitive decline on physical, social and mental functioning and mortality. 3) Social participation: impact on health and functioning in early old age: To examine the socioeconomic and gender patterning of social participation trajectories over the adult life course. To examine the effects of social participation on functioning and chronic disease and to address the issues of reverse causation and confounding in the association between social participation and health. The relevance of our research is tied in with continuing increase in life expectancy and the need to identify potentially modifiable risk factors to improve overall health and reduce social inequalities in the health of older populations. Aging trajectories appear to diverge fairly early on and our data on a multitude of risk factors and health measures on individuals from early mid-life to old age are an important resource to study the determinants of heterogeneity in aging trajectories.

Public Health Relevance

Whitehall II's first major achievement was to put the social gradient in health high on the research agenda of the scientific community. Testimonies to the success of that early pioneering work are replica studies in a number of countries and research programs to investigate the pathways from social position to health in every continent. Following recognition by the scientific community, the next hurdle was to bring the social gradient to the attention of policy makers. Here the effort of Professor Sir Michael Marmot has brought outstanding success culminating in Sir Michael being asked to chair the ongoing WHO Commission on the Social Determinants of Health. Now, twenty two from its inception, Whitehall II is primed to address one of the major challenges of the new millennium;disparities in health and functioning in an ageing population. Research in this domain is crucial as positive health trajectories are related to higher quality of life, longer independence and considerably lower medical and social care costs.

Agency
National Institute of Health (NIH)
Institute
National Institute on Aging (NIA)
Type
Research Project (R01)
Project #
2R01AG013196-14
Application #
7649603
Study Section
Social Sciences and Population Studies Study Section (SSPS)
Program Officer
Patmios, Georgeanne E
Project Start
1996-04-01
Project End
2014-06-30
Budget Start
2009-09-15
Budget End
2010-06-30
Support Year
14
Fiscal Year
2009
Total Cost
$576,731
Indirect Cost
Name
University College London
Department
Type
DUNS #
225410919
City
London
State
Country
United Kingdom
Zip Code
WC1 -6BT
Johnson, William; Bell, Joshua A; Robson, Ellie et al. (2018) Do worse baseline risk factors explain the association of healthy obesity with increased mortality risk? Whitehall II Study. Int J Obes (Lond) :
Welch, Catherine A; Sabia, Séverine; Brunner, Eric et al. (2018) Does pattern mixture modelling reduce bias due to informative attrition compared to fitting a mixed effects model to the available cases or data imputed using multiple imputation?: a simulation study. BMC Med Res Methodol 18:89
de Keijzer, Carmen; Tonne, Cathryn; Basagaña, Xavier et al. (2018) Residential Surrounding Greenness and Cognitive Decline: A 10-Year Follow-up of the Whitehall II Cohort. Environ Health Perspect 126:077003
Tanaka, Akihiro; Shipley, Martin J; Welch, Catherine A et al. (2018) Socioeconomic inequality in recovery from poor physical and mental health in mid-life and early old age: prospective Whitehall II cohort study. J Epidemiol Community Health 72:309-313
Tynkkynen, Juho; Chouraki, Vincent; van der Lee, Sven J et al. (2018) Association of branched-chain amino acids and other circulating metabolites with risk of incident dementia and Alzheimer's disease: A prospective study in eight cohorts. Alzheimers Dement 14:723-733
Mortensen, Jesper; Dich, Nadya; Lange, Theis et al. (2018) Weekly hours of informal caregiving and paid work, and the risk of cardiovascular disease. Eur J Public Health 28:743-747
Akbaraly, Tasnime; Würtz, Peter; Singh-Manoux, Archana et al. (2018) Association of circulating metabolites with healthy diet and risk of cardiovascular disease: analysis of two cohort studies. Sci Rep 8:8620
O'Neill, Dara; Britton, Annie; Hannah, Mary K et al. (2018) Association of longitudinal alcohol consumption trajectories with coronary heart disease: a meta-analysis of six cohort studies using individual participant data. BMC Med 16:124
Mein, Gill; Grant, Robert (2018) A cross-sectional exploratory analysis between pet ownership, sleep, exercise, health and neighbourhood perceptions: the Whitehall II cohort study. BMC Geriatr 18:176
Fleischmann, Maria; Carr, Ewan; Stansfeld, Stephen A et al. (2018) Can favourable psychosocial working conditions in midlife moderate the risk of work exit for chronically ill workers? A 20-year follow-up of the Whitehall II study. Occup Environ Med 75:183-190

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