Physical activity and chronic back disorders: A comparison between self-reported and accelerometer-measured physical activity
Oral Presentation C10.8
DOI:
https://doi.org/10.14288/hfjc.v14i3.709Keywords:
Adults, Physical Activity, Questionnaire, Accelerometry, Back PainAbstract
Background: Imprecise measurement of PA might distort estimates of the effects of regular PA on musculoskeletal health. Purpose: To explore the relationship between physical activity [PA] and chronic back disorders [CBD] in Canadian adults using either accelerometer-based or self-reported PA measures. Methods: Using cross-sectional data from Canadian adults [18-75 years] from the 2014/15 and 2016/17 Canadian Health Measures Survey [CHMS], we compared the relationship between CBD and meeting the Canadian PA guidelines of ‘150 min/week or more of moderate-to-vigorous PA’ using both accelerometer-based and self-reported PA measures. Two models were fitted: one containing self-reported PA, and another containing accelerometer-based PA, each model adjusted for several covariates. The beta coefficients obtained were evaluated using the Z test for equality of coefficient and a newly developed bias attributable to PA measurement [BAPAM] indicator. Results: The percentage of participants meeting the Canadian PA guidelines was 57.3% using the self-reported and 17.0% using the accelerometer-based PA measures, respectively. Meeting the Canadian PA guidelines was not associated with CBD, whether PA was measured by an accelerometer or by self-report. The Z test [ p=0.962], and the BAPAM indicator = 0.038 [95% CI -2.42, 2.49; p=0.443] showed that the coefficients of the association under study were not significantly different. Conclusions: A BAPAM indicator between 0 and 1 suggested a potential bias to the null hypothesis of no association; however, this bias was not statistically significant. Funding: This work was supported in part by the Canada Research Chairs program [#228136], the University of Saskatchewan, Canada, and the Universidad de Santander, Colombia.
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Copyright (c) 2021 Adriana Angarita-Fonesca, Catherine Trask, Punam Pawha, Katya Herman, Daniel Fuller, Brenna Bath
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