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Sedentary Time and Physical Activity Across Occupational Classifications

Posted on 2019-11-16 - 13:09
Purpose:

To examine differences in activity patterns across employment and occupational classifications.

Design:

Cross-sectional.

Setting:

A 2005-2006 Coronary Artery Risk Development in Young Adults (CARDIA) study.

Sample:

Participants with valid accelerometry data (n = 2068).

Measures:

Uniaxial accelerometry data (ActiGraph 7164), accumulated during waking hours, were summarized as mean activity counts (counts/min) and time spent (min/d) in long-bout sedentary (≥30 minutes, SED≥30), short-bout sedentary (<30 minutes, SED<30), light physical activity (LPA), short-bout moderate-to-vigorous physical activity (<10 minutes, MVPA<10), and long-bout MVPA (≥10 minutes, MVPA≥10) using Freedson cut-points. Employment status was self-reported as full time, part time, unemployed, keeping house, or raising children. Self-reported job duties were categorized into 23 major groups using the 2010 Standard Occupational Classification.

Analysis:

Omnibus differences were analyzed using adjusted analysis of covariance and repeated after stratification by race (black/white) and sex (female/male).

Results:

SED≥30, SED<30, LPA, and MVPA<10 differed significantly by employment and occupational categories (P ≤ .05), while MVPA≥10 did not (P ≥ .50). SED≥30, SED<30, and LPA differed by occupational classification in men, women, blacks, and whites (P < .05). Mean activity counts, MVPA<10, and MVPA≥10 were significantly different across occupational classifications in whites (P ≤ .05), but not in blacks (P > .05). Significant differences in mean activity counts and MVPA<10 across occupational classifications were found in males (P ≤ .001), but not in females (P > .05).

Conclusion:

Time within activity intensity categories differs across employment and occupational classifications and by race and sex.

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AUTHORS (9)

Tyler D. Quinn
Kelley Pettee Gabriel
Juned Siddique
David Aaby
Kara M. Whitaker
Abbi Lane-Cordova
Stephen Sidney
Barbara Sternfield
Bethany Barone Gibbs
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