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The main aim of this paper is to describe the background, design, methods, limitations and perspectives of the Danish Physical Activity cohort with Objective measurements (DPhacto) investigating the association between objectively measured physical activities capturing work and leisure time and frequent measurements of musculoskeletal pain among blue-collar workers.
The main aim of DPhacto is to investigate the association between objectively measured physical activities at work and frequent prospective measurements of musculoskeletal pain among blue-collar workers.
Perhaps the discrepancy could be explained by the fact that they measured physical activities based on self-reported binary questions or that they did not use the lowest quintile approach for cut-off points.
Analyses of Hypothesis 2: High levels of objectively measured physical activities at work increase the risk for aggravation of musculoskeletal pain: The test of Hypothesis 2 will be based on analyses of the effect of the physical activity on the repeated measurements of the level of pain at the specific site among participants with pain (i.e. pain intensity > 0) at the specific site at baseline.
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In addition, the two studies that measured physical activity subjectively omitted reporting details on their measurement instruments.
Changes in objectively measured physical activity (performance) after epidural steroid injection for lumbar spinal stenosis.
Objectively measured physical activity may not be the key determinant of unhealthy weight gain in children.
Associations between birth weight (quartiles) and components of objectively measured physical activity within each individual study are displayed graphically.
Objectively measured physical activity did not change.
However, none of these five studies measured physical activity objectively.
The included studies measured physical activity using several different methods.
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