Testing an adaptation of the EPIC physical activity questionnaire in Portuguese adults: a validation study that assesses the seasonal bias of self-report

Camões, Miguel; Severo, Milton; Santos, Ana; Barros, Henrique; Lopes, Carla

Publication

Testing an adaptation of the EPIC physical activity questionnaire in Portuguese adults: a validation study that assesses the seasonal bias of self-report

2010Journal article

dc.contributor.author	Camões, Miguel
dc.contributor.author	Severo, Milton
dc.contributor.author	Santos, Ana
dc.contributor.author	Barros, Henrique
dc.contributor.author	Lopes, Carla
dc.date.accessioned	2011-05-27T11:03:38Z
dc.date.available	2011-05-27T11:03:38Z
dc.date.issued	2010
dc.description.abstract	Background: No self-report method to measure different types and intensities of physical activity (PA) in adults has been tested in the Portuguese population. We assessed the validity, reproducibility and seasonal bias on past-year PA reporting. Subjects and methods: A sample of 953 Portuguese adults was evaluated between 2001 and 2003. A 4x7-day PA diary was used as a reference method to evaluate the validity of the EPIC questionnaire adapted for the Portuguese population (n = 114). Spearman’s correlation coefficients were calculated and agreement was tested using Bland–Altman plots. Trigonometric linear models were used to assess the seasonal variation. Results: Correlations between the questionnaire and the diaries were 0.56, 0.50, 0.88 and 0.78 for total, rest, occupational and leisure-time PA, respectively. The coefficients for reproducibility (2–3 months interval) ranged between 0.80 for leisure and 0.91 for occupational. Visualizing Bland–Altman plots, only rest PA revealed a tendency towards an increase in differences with increasing rest reported. Males interviewed in April and August reported the highest and lowest mean of leisure-time PA, respectively. For professional activities, the probability of amplitude being over one-half standard deviation was 33%. Conclusions: The questionnaire is a valid and reproducible instrument for the brief assessment of usual energy expenditure in adults, detailing different types of PA. In males, seasonal bias on reporting leisure-time and professional PA was found.	por
dc.identifier.citation	Camões, Miguel; Severo, Milton; Santos, Ana; Barros, Henrique; Lopes, Henrique (2010). Testing an adaptation of the EPIC physical activity questionnaire in Portuguese adults: a validation study that assesses the seasonal bias of self-report. Annals of Human Biology. ISSN 0301-4460. 37:2, p. 185-197	por
dc.identifier.issn	0301-4460
dc.identifier.uri	http://hdl.handle.net/10198/4643
dc.language.iso	eng	por
dc.peerreviewed	yes	por
dc.publisher	Taylor & Francis	por
dc.relation.publisherversion	http://informahealthcare.com/doi/abs/10.3109/03014460903341836	por
dc.subject	Physical activity	por
dc.subject	Measurement	por
dc.subject	Validity	por
dc.subject	Reproducibility	por
dc.subject	Seasonal bias	por
dc.title	Testing an adaptation of the EPIC physical activity questionnaire in Portuguese adults: a validation study that assesses the seasonal bias of self-report	por
dc.type	journal article
dspace.entity.type	Publication
oaire.citation.endPage	198	por
oaire.citation.startPage	186	por
oaire.citation.title	Annals of Human Biology	por
rcaap.rights	openAccess	por
rcaap.type	article	por