- Title
- Validity and bias on the online active Australia survey: activity level and participant factors associated with self-report bias
- Creator
- Curtis, Rachel G.; Olds, Timothy; Plotnikoff, Ronald; Vandelanotte, Corneel; Edney, Sarah; Ryan, Jillian; Maher, Carol
- Relation
- NHMRC.APP1080186 http://purl.org/au-research/grants/nhmrc/1080186
- Relation
- BMC Medical Research Methodology Vol. 20, no. 6
- Publisher Link
- http://dx.doi.org/10.1186/s12874-020-0896-4
- Publisher
- Biomed Central
- Resource Type
- journal article
- Date
- 2020
- Description
- Background: This study examined the criterion validity of the online Active Australia Survey, using accelerometry as the criterion, and whether self-report bias was related to level of activity, age, sex, education, body mass index and health-related quality of life. Methods: The online Active Australia Survey was validated against the GENEActiv accelerometer as a direct measure of activity. Participants (n = 344) wore an accelerometer for 7 days, completed the Active Australia Survey, and reported their health and demographic characteristics. A Spearman’s rank coefficient examined the association between minutes of moderate-to-vigorous physical activity recorded on the Active Australia Survey and GENEActiv accelerometer. A Bland-Altman plot illustrated self-report bias (the difference between methods). Linear mixed effects modelling was used to examine whether participant factors predicted self-report bias. Results: The association between moderate-to-vigorous physical activity reported on the online Active Australia Survey and accelerometer was significant (rs = .27, p < .001). Participants reported 4 fewer minutes per day on the Active Australia Survey than was recorded by accelerometry (95% limits of agreement −104 – 96 min) but the difference was not significant (t(343) = −1.40, p = .16). Self-report bias was negatively associated with minutes of accelerometer-recorded moderate-to-vigorous physical activity and positively associated with mental health-related quality of life. Conclusions: The online Active Australia Survey showed limited criterion validity against accelerometry. Self-report bias was related to activity level and mental health-related quality of life. Caution is recommended when interpreting studies using the online Active Australia Survey.
- Subject
- physical activity; questionnaire; accelerometry; psychometrics; SDG 5; SDG 3; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1437987
- Identifier
- uon:40529
- Identifier
- ISSN:1471-2288
- Language
- eng
- Reviewed
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Goal 5: Gender Equality
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