Obesity

Obesity, psychological well-being related measures, and risk of seven non-communicable diseases: evidence from longitudinal studies of UK and US older adults

Int J Obes (Lond)Published Prospective cohort study

Authors' conclusion

Obesity and psychological well-being may independently and additively increase the risk of developing NCDs.

Study context

Population
Older adults in the English Longitudinal Study of Ageing (ELSA), UK (baseline 2008/2009), and the Health and Retirement Study (HRS), US (baseline 2008/2010); obesity defined by objective BMIELSA n = 8127
Exposure
Obesity vs no obesity; psychological well-being related measures as mediators
Outcome
Risk of NCDs (hypertension, heart disease, stroke, diabetes, arthritis, cancer, memory-related disease) and cumulative number of NCDs; mediation by psychological well-being related measures
Methodological detailstwo longitudinal cohorts (ELSA, UK; HRS, US), Cox proportional hazard models, Poisson regression, causal mediation analysis
  • Two longitudinal cohorts (ELSA, UK; HRS, US)
  • Cox proportional hazard models
  • Poisson regression
  • Causal mediation analysis

Main finding

As reported in the abstract

Mediation of obesity–NCD associations by psychological well-being
  • Obesity consistently associated with increased prospective risk of hypertension, heart disease, diabetes, arthritis and cumulative number of NCDs in both ELSA and HRS
  • Neither the overall psychological well-being index nor any individual psychological well-being related measure mediated why obesity increased NCD risk in either study

Observational data: associations, not effects.

Further findings

Worse overall psychological well-being (index) and some individual measures associated with increased prospective risk of heart disease, stroke, arthritis, memory-related disease and cumulative number of NCDs across studies

Original publication

Obesity, psychological well-being related measures, and risk of seven non-communicable diseases: evidence from longitudinal studies of UK and US older adults. Int J Obes (Lond). Published 1 June 2024. doi:10.1038/s41366-024-01551-1

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