Int J Health Geogr - Examining the spatial congruence between data obtained with a novel activity location questionnaire, continuous GPS tracking, and prompted recall surveys.


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CKGROUND: Place and health researchers are increasingly interested in integrating individuals' mobility and the experience they have with multiple settings in their studies. In practice, however, few tools exist which allow for rapid and accurate gathering of detailed information on the geographic location of places where people regularly undertake activities. We describe the development and validation of a new activity location questionnaire which can be useful in accounting for multiple environmental influences in large population health investigations.METHODS: To develop the questionnaire, we relied on a literature review of similar data collection tools and on results of a pilot study wherein we explored content validity, test-retest reliability, and face validity. To estimate convergent validity, we used data from a study of users of a public bicycle share program conducted in Montreal, Canada in 2011. We examined the spatial congruence between questionnaire data and data from three other sources: 1) one-week GPS tracks; 2) activity locations extracted from the GPS tracks; and 3) a prompted recall survey of locations visited during the day. Proximity and convex hull measures were used to compare questionnaire-derived data and GPS and prompted recall survey data.RESULTS: In the sample, 75% of questionnaire-reported activity locations were located within 400 meters of an activity location recorded on the GPS track or through the prompted recall survey. Results from convex hull analyses suggested questionnaire activity locations were more concentrated in space than GPS or prompted-recall locations.CONCLUSIONS: The new questionnaire has high convergent validity and can be used to accurately collect data on regular activity spaces in terms of locations regularly visited. The methods, measures, and findings presented provide new material to further study mobility in place and health research.

Resumo Limpo

ckground place health research increas interest integr individu mobil experi multipl set studi practic howev tool exist allow rapid accur gather detail inform geograph locat place peopl regular undertak activ describ develop valid new activ locat questionnair can use account multipl environment influenc larg popul health investigationsmethod develop questionnair reli literatur review similar data collect tool result pilot studi wherein explor content valid testretest reliabl face valid estim converg valid use data studi user public bicycl share program conduct montreal canada examin spatial congruenc questionnair data data three sourc oneweek gps track activ locat extract gps track prompt recal survey locat visit day proxim convex hull measur use compar questionnairederiv data gps prompt recal survey dataresult sampl questionnairereport activ locat locat within meter activ locat record gps track prompt recal survey result convex hull analys suggest questionnair activ locat concentr space gps promptedrecal locationsconclus new questionnair high converg valid can use accur collect data regular activ space term locat regular visit method measur find present provid new materi studi mobil place health research

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