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Relationships between socioeconomic position and objectively measured sedentary behaviour in older adults in three prospective cohorts

(2017) BMJ OPEN. 7(6).
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Abstract
Objectives: To investigate whether sedentary behaviour in older adults is associated with a systematic and comprehensive range of socioeconomic position (SEP) measures across the life course. SEP measures included prospective measures of social class, income, educational qualifications and parental social class and contemporaneous measures of area deprivation. Setting: Glasgow and the surrounding (West of Scotland) combined with Edinburgh and the surrounding area (the Lothians). Participants: Community-dwelling adults aged around 79, 83, and 64 years from, respectively, the Lothian Birth Cohort 1936 (LBC1936) (n= 271) and the 1930s (n= 119) and 1950s (n= 310) cohorts of the West of Scotland Twenty-07 study. Primary outcome measure: Sedentary behaviour was measured objectively using an activPAL activity monitor worn continuously for 7 days and used to calculate percentage of waking time spent sedentary. Results: Among retired participants, for most cohort and SEP combinations, greater social disadvantage was associated with increased sedentary time. For example, in the Twenty-07 1930s cohort, those most deprived on the Carstairs measure spent 6.5% (95% CI 0.3 to 12.7) more of their waking time sedentary than the least deprived. However, for employed people, the relationship between SEP and sedentary behaviour was much weaker. For example, in terms of social class differences, among the retired, the most disadvantaged spent 5.7% more waking time sedentary (95% CI 2.6% to 87%), whereas among the employed, there was effectively no difference (-0.5%; 95% CI -9.0 to 8.0). Conclusions: Diverse SEP measures were associated with increased sedentary behaviour among retired people. There was little evidence for a relationship between SEP measures and sedentary behaviour among employed older adults. Prior to retirement, the constraints of the workplace may be masking effects that are only apparent at weekends.
Keywords
TELEVISION VIEWING TIME, PHYSICAL-ACTIVITY, SITTING TIME, NEIGHBORHOOD WALKABILITY, CARDIOVASCULAR-DISEASE, WHITEHALL-II, SOCIAL-CLASS, DETERMINANTS, HEALTH, MORTALITY

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MLA
Shaw, Richard John et al. “Relationships Between Socioeconomic Position and Objectively Measured Sedentary Behaviour in Older Adults in Three Prospective Cohorts.” BMJ OPEN 7.6 (2017): n. pag. Print.
APA
Shaw, R. J., Čukić, I., Deary, I. J., Gale, C. R., Chastin, S., Dall, P. M., Skelton, D. A., et al. (2017). Relationships between socioeconomic position and objectively measured sedentary behaviour in older adults in three prospective cohorts. BMJ OPEN, 7(6).
Chicago author-date
Shaw, Richard John, Iva Čukić, Ian J Deary, Catharine R Gale, Sebastien Chastin, Philippa M Dall, Dawn A Skelton, and Geoff Der. 2017. “Relationships Between Socioeconomic Position and Objectively Measured Sedentary Behaviour in Older Adults in Three Prospective Cohorts.” Bmj Open 7 (6).
Chicago author-date (all authors)
Shaw, Richard John, Iva Čukić, Ian J Deary, Catharine R Gale, Sebastien Chastin, Philippa M Dall, Dawn A Skelton, and Geoff Der. 2017. “Relationships Between Socioeconomic Position and Objectively Measured Sedentary Behaviour in Older Adults in Three Prospective Cohorts.” Bmj Open 7 (6).
Vancouver
1.
Shaw RJ, Čukić I, Deary IJ, Gale CR, Chastin S, Dall PM, et al. Relationships between socioeconomic position and objectively measured sedentary behaviour in older adults in three prospective cohorts. BMJ OPEN. 2017;7(6).
IEEE
[1]
R. J. Shaw et al., “Relationships between socioeconomic position and objectively measured sedentary behaviour in older adults in three prospective cohorts,” BMJ OPEN, vol. 7, no. 6, 2017.
@article{8556260,
  abstract     = {Objectives: To investigate whether sedentary behaviour in older adults is associated with a systematic and comprehensive range of socioeconomic position (SEP) measures across the life course. SEP measures included prospective measures of social class, income, educational qualifications and parental social class and contemporaneous measures of area deprivation. 
Setting: Glasgow and the surrounding (West of Scotland) combined with Edinburgh and the surrounding area (the Lothians). 
Participants: Community-dwelling adults aged around 79, 83, and 64 years from, respectively, the Lothian Birth Cohort 1936 (LBC1936) (n= 271) and the 1930s (n= 119) and 1950s (n= 310) cohorts of the West of Scotland Twenty-07 study. 
Primary outcome measure: Sedentary behaviour was measured objectively using an activPAL activity monitor worn continuously for 7 days and used to calculate percentage of waking time spent sedentary. 
Results: Among retired participants, for most cohort and SEP combinations, greater social disadvantage was associated with increased sedentary time. For example, in the Twenty-07 1930s cohort, those most deprived on the Carstairs measure spent 6.5% (95% CI 0.3 to 12.7) more of their waking time sedentary than the least deprived. However, for employed people, the relationship between SEP and sedentary behaviour was much weaker. For example, in terms of social class differences, among the retired, the most disadvantaged spent 5.7% more waking time sedentary (95% CI 2.6% to 87%), whereas among the employed, there was effectively no difference (-0.5%; 95% CI -9.0 to 8.0). 
Conclusions: Diverse SEP measures were associated with increased sedentary behaviour among retired people. There was little evidence for a relationship between SEP measures and sedentary behaviour among employed older adults. Prior to retirement, the constraints of the workplace may be masking effects that are only apparent at weekends.},
  articleno    = {e01643},
  author       = {Shaw, Richard John and Čukić, Iva and Deary, Ian J and Gale, Catharine R and Chastin, Sebastien and Dall, Philippa M and Skelton, Dawn A and Der, Geoff},
  issn         = {2044-6055},
  journal      = {BMJ OPEN},
  keywords     = {TELEVISION VIEWING TIME,PHYSICAL-ACTIVITY,SITTING TIME,NEIGHBORHOOD WALKABILITY,CARDIOVASCULAR-DISEASE,WHITEHALL-II,SOCIAL-CLASS,DETERMINANTS,HEALTH,MORTALITY},
  language     = {eng},
  number       = {6},
  pages        = {10},
  title        = {Relationships between socioeconomic position and objectively measured sedentary behaviour in older adults in three prospective cohorts},
  url          = {http://dx.doi.org/10.1136/bmjopen-2017-016436},
  volume       = {7},
  year         = {2017},
}

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