Midlife determinants associated with sedentary behavior in old age

Area of Science:

• Gerontology
• Public Health
• Behavioral Science

Background:

• Sedentary behavior is linked to negative health outcomes.
• Understanding sedentary behavior determinants is crucial for prevention.
• Sedentary behavior requires independent identification of its determinants.

Purpose of the Study:

• To investigate prospective associations between midlife determinants and objectively measured sedentary time in older age.
• To identify specific demographic, socioeconomic, lifestyle, and biomedical factors influencing long-term sedentary behavior.

Main Methods:

• Utilized data from 565 participants (aged 73-92) in the AGES-II Reykjavik Study.
• Objectively measured sedentary time using hip-worn accelerometers over seven consecutive days.
• Analyzed midlife factors (collected ~31 years prior) using linear regression models.

Main Results:

• Midlife factors associated with increased daily sedentary time in old age included: not being married (15.3 min), primary education (12.4 min), living in apartments/duplexes (13.3-13.5 min), obesity (21.8 min), and heart disease (38.9 min).
• Associations remained significant after adjusting for various covariates in old age.
• These findings highlight specific midlife predictors of later-life sedentary behavior.

Conclusions:

• Midlife demographic, socioeconomic, and biomedical factors significantly predict greater sedentary time in older adults.
• These predictors offer potential for identifying individuals at risk of high sedentary behavior in old age.
• Results support the development of targeted interventions to reduce sedentary time in older populations.