Television viewing, C-reactive protein, and depressive symptoms in older adults
journal contribution
posted on 2015-11-02, 13:37authored byMark Hamer, Lydia Poole, Nadine Messerli-Burgy
There is emerging evidence for a link between sedentary behavior and mental health, although the mechanisms remain unknown. We tested if an underlying inflammatory process explains the association
between sedentary behavior and depressive symptoms. We conducted a two year follow-up of 4964 (aged 64.5 ± 8.9 years) men and women from the English Longitudinal Study of Ageing, a cohort of community dwelling older adults. Self-reported TV viewing time was assessed at baseline as a marker of leisure
time sedentary behavior. The eight-item Centre of Epidemiological Studies Depression (CES-D) scale was administered to measure depressive symptoms at follow-up. At baseline, TV time was associated with C-reactive protein (CRP), adjusted geometric mean CRP values were 2.94 mg/L (<2 h/d TV);
3.04 mg/L (2–4 h/d TV); 3.29 mg/L (4–6 h/d TV); 3.23 mg/L (>6 h/d TV). We observed both a direct association of TV time on CES-D score at follow-up (B = 0.08, 95% CI, 0.05, 0.10) and indirect effects (B = 0.07,
95% CI, 0.05, 0.08). The indirect effects were largely explained through lack of physical activity, smoking, and alcohol, but not by CRP or body mass index.
Funding
This paper is funded by the National Institute on Aging in the United States (grants 2RO1AG7644-01A1 and 2RO1AG017644)
and a consortium of UK government departments coordinated by the Office for National Statistics.
History
School
Sport, Exercise and Health Sciences
Published in
Brain, Behavior, and Immunity
Citation
HAMER, M., POOLE, L. and MESSERLI-BURGY, N., 2013. Television viewing, C-reactive protein, and depressive symptoms in older adults. Brain, Behavior, and Immunity, 33, pp. 29–32.
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