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|Title: ||Reliability and validity of the transport and physical activity questionnaire (TPAQ) for assessing physical activity behaviour|
|Authors: ||Adams, Emma J.|
Bull, Fiona C.
Cooper, Ashley R.
|Issue Date: ||2014|
|Publisher: ||Public Library Science (© 2014 Adams et al.)|
|Citation: ||ADAMS, E.J. ... et al, 2014. Reliability and Validity of the Transport and Physical Activity Questionnaire (TPAQ) for Assessing Physical Activity Behaviour. PLoS ONE, 9 (9), e107039, doi:10.1371/journal.pone.0107039|
|Abstract: ||Background: No current validated survey instrument allows a comprehensive assessment of both physical activity and
travel behaviours for use in interdisciplinary research on walking and cycling. This study reports on the test-retest reliability
and validity of physical activity measures in the transport and physical activity questionnaire (TPAQ).
Methods: The TPAQ assesses time spent in different domains of physical activity and using different modes of transport for
five journey purposes. Test-retest reliability of eight physical activity summary variables was assessed using intra-class
correlation coefficients (ICC) and Kappa scores for continuous and categorical variables respectively. In a separate study, the
validity of three survey-reported physical activity summary variables was assessed by computing Spearman correlation
coefficients using accelerometer-derived reference measures. The Bland-Altman technique was used to determine the
absolute validity of survey-reported time spent in moderate-to-vigorous physical activity (MVPA).
Results: In the reliability study, ICC for time spent in different domains of physical activity ranged from fair to substantial for
walking for transport (ICC = 0.59), cycling for transport (ICC = 0.61), walking for recreation (ICC = 0.48), cycling for recreation
(ICC = 0.35), moderate leisure-time physical activity (ICC = 0.47), vigorous leisure-time physical activity (ICC = 0.63), and total
physical activity (ICC = 0.56). The proportion of participants estimated to meet physical activity guidelines showed
acceptable reliability (k = 0.60). In the validity study, comparison of survey-reported and accelerometer-derived time spent in
physical activity showed strong agreement for vigorous physical activity (r = 0.72, p,0.001), fair but non-significant
agreement for moderate physical activity (r = 0.24, p = 0.09) and fair agreement for MVPA (r = 0.27, p = 0.05). Bland-Altman
analysis showed a mean overestimation of MVPA of 87.6 min/week (p = 0.02) (95% limits of agreement 2447.1 to
Conclusion: The TPAQ provides a more comprehensive assessment of physical activity and travel behaviours and may be
suitable for wider use. Its physical activity summary measures have comparable reliability and validity to those of similar
|Description: ||© 2014 Adams et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits
unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.|
|Publisher Link: ||http://dx.doi.org/10.1371/journal.pone.0107039|
|Appears in Collections:||Published Articles (Sport, Exercise and Health Sciences)|
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