Physical Activity in Middle-Aged Women: A Study on Reporting and Repeatability
Author Information
Author(s): Miranda E.G. Armstrong, Benjamin J. Cairns, Jane Green, Gillian K. Reeves, Valerie Beral
Primary Institution: Cancer Epidemiology Unit, University of Oxford
Hypothesis
How overall physical activity relates to specific activities and how reported activity changes over time may influence interpretation of observed associations between physical activity and health.
Conclusion
Responses to questions on physical activity frequency at baseline were associated with hours spent on specific activities reported three years later, with the weakest associations found for housework.
Supporting Evidence
- Women reported spending an average of 14 hours per week on housework and 4.5 hours on walking.
- The repeatability of physical activity responses decreased significantly over time.
- The study included 589,896 women who completed both baseline and follow-up questionnaires.
Takeaway
This study looked at how women reported their physical activity over time and found that what they said they did at the start was linked to what they reported doing later, but not very well for housework.
Methodology
Participants completed a baseline questionnaire on physical activity and a follow-up questionnaire three years later, with data analyzed for associations and repeatability.
Potential Biases
Self-reporting may lead to social desirability bias, where participants answer in a way they think is more favorable.
Limitations
The study relied on self-reported data, which can be subject to measurement error and social desirability bias.
Participant Demographics
Middle-aged women in the UK, average age 56 years.
Statistical Information
P-Value
< 0.0001
Statistical Significance
p<0.003
Digital Object Identifier (DOI)
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