{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T15:09:48Z","timestamp":1790176188667,"version":"4.1.0"},"reference-count":36,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2016,10,17]],"date-time":"2016-10-17T00:00:00Z","timestamp":1476662400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100002341","name":"Suomen Akatemia","doi-asserted-by":"publisher","award":["255403"],"award-info":[{"award-number":["255403"]}],"id":[{"id":"10.13039\/501100002341","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100002341","name":"Suomen Akatemia","doi-asserted-by":"publisher","award":["285747"],"award-info":[{"award-number":["285747"]}],"id":[{"id":"10.13039\/501100002341","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Scandinavian Med Sci Sports"],"published-print":{"date-parts":[[2017,11]]},"abstract":"<jats:p>The aim is to determine concurrent validity of a single self\u2010report habitual physical activity (<jats:styled-content style=\"fixed-case\">PA<\/jats:styled-content>) question against accelerometer\u2010based<jats:styled-content style=\"fixed-case\">PA<\/jats:styled-content>and mobility variables, and corresponding changes in self\u2010reported<jats:styled-content style=\"fixed-case\">PA<\/jats:styled-content>and mobility. Cross\u2010sectional and longitudinal data of the \u201cLife\u2010space mobility in old age\u201d (<jats:styled-content style=\"fixed-case\">LISPE<\/jats:styled-content>) cohort and its substudy on<jats:styled-content style=\"fixed-case\">PA<\/jats:styled-content>were utilized. At baseline, 848 community\u2010dwelling, 75\u2010 to 90\u2010year\u2010old people living independently in central Finland participated in home\u2010based interviews. One and 2\u00a0years later, 816 and 761 of them were reassessed by phone, respectively. Tri\u2010axial accelerometer data over 7\u00a0days were collected following the baseline assessments in a subsample of 174. Self\u2010reported habitual<jats:styled-content style=\"fixed-case\">PA<\/jats:styled-content>was assessed based on intensity and duration using a single question with seven response options (range: mostly resting to competitive sports). Mobility variables were as follows: life\u2010space mobility, walking difficulty over 500\u00a0m, and short physical performance battery. Statistically significant correlations were found between self\u2010reported habitual<jats:styled-content style=\"fixed-case\">PA<\/jats:styled-content>and mobility (Spearman correlation coefficient Rs\u00a0=\u00a00.40\u20130.61) and accelerometer\u2010based<jats:styled-content style=\"fixed-case\">PA<\/jats:styled-content>variables [step counts (Rs\u00a0=\u00a00.49), time in moderate (Rs\u00a0=\u00a00.49) and low intensity (Rs\u00a0=\u00a00.40)<jats:styled-content style=\"fixed-case\">PA<\/jats:styled-content>, and time in sedentary behavior (Rs\u00a0=\u00a0\u22120.28)]. A decline in self\u2010reported habitual<jats:styled-content style=\"fixed-case\">PA<\/jats:styled-content>over time was associated with 5\u201310p decline in life\u2010space mobility (<jats:styled-content style=\"fixed-case\">PA<\/jats:styled-content>improvement with 0\u20133p increase) and with developing a higher degree of walking difficulty (in 35\u201344% of participants). In conclusion, based on these results, the self\u2010report question to assess habitual<jats:styled-content style=\"fixed-case\">PA<\/jats:styled-content>is valid and responsive to change and thus useful for epidemiological research in community\u2010dwelling older people, also in follow\u2010up studies.<\/jats:p>","DOI":"10.1111\/sms.12782","type":"journal-article","created":{"date-parts":[[2016,10,17]],"date-time":"2016-10-17T08:11:21Z","timestamp":1476691881000},"page":"1423-1430","source":"Crossref","is-referenced-by-count":40,"title":["Validity of a single question to assess habitual physical activity of community\u2010dwelling older people"],"prefix":"10.1111","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5205-9616","authenticated-orcid":false,"given":"E.","family":"Portegijs","sequence":"first","affiliation":[{"name":"Gerontology Research Center and Department of Health Sciences University of Jyv\u00e4skyl\u00e4 Jyv\u00e4skyl\u00e4 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