{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,17]],"date-time":"2026-10-17T21:01:11Z","timestamp":1792270871973,"version":"4.4.0"},"reference-count":25,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2014,12,31]],"date-time":"2014-12-31T00:00:00Z","timestamp":1419984000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"Pittsburgh Claude D. Pepper Older Americans Independence Center Developmental Pilot","award":["NIH P30 AG024826"],"award-info":[{"award-number":["NIH P30 AG024826"]}]},{"name":"Intramural Research Program, National Institute on Aging"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J American Geriatrics Society"],"published-print":{"date-parts":[[2015,1]]},"abstract":"<jats:sec>\n                    <jats:title>Objectives<\/jats:title>\n                    <jats:p>\n                      To describe the development of the Pittsburgh Fatigability Scale (\n                      <jats:styled-content style=\"fixed-case\">PFS<\/jats:styled-content>\n                      ) and establish its reliability and concurrent and convergent validity against performance measures.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Design<\/jats:title>\n                    <jats:p>Cross\u2010sectional.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Setting<\/jats:title>\n                    <jats:p>University of Pittsburgh, Pittsburgh, Pennsylvania.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Participants<\/jats:title>\n                    <jats:p>\n                      Scale development sample: 1,013 individuals aged 60 and older from two registries; validation sample: 483 adults aged 60 and older from the Baltimore Longitudinal Study of Aging (\n                      <jats:styled-content style=\"fixed-case\">BLSA<\/jats:styled-content>\n                      ).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Measurements<\/jats:title>\n                    <jats:p>\n                      The scale development sample and\n                      <jats:styled-content style=\"fixed-case\">BLSA<\/jats:styled-content>\n                      participants self\u2010administered an initial 26\u2010item perceived fatigability scale.\n                      <jats:styled-content style=\"fixed-case\">BLSA<\/jats:styled-content>\n                      participants also completed measures of performance fatigability (perceived exertion from a standard treadmill task and performance deterioration from a fast\u2010paced long\u2010distance corridor walk), a 6\u2010m usual\u2010paced corridor walk, and five timed chair stands.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Principal components analysis with varimax rotation reduced the 26\u2010item scale to the 10\u2010item\n                      <jats:styled-content style=\"fixed-case\">PFS<\/jats:styled-content>\n                      . The\n                      <jats:styled-content style=\"fixed-case\">PFS<\/jats:styled-content>\n                      showed strong internal consistency (Cronbach's alpha 0.88) and excellent test\u2013retest reliability (intraclass correlation 0.86). In the validation sample,\n                      <jats:styled-content style=\"fixed-case\">PFS<\/jats:styled-content>\n                      scores, adjusted for age, sex, and race, were greater for those with high performance fatigability, slow gait speed, worse physical function, and lower fitness, with differences between high and low fatigability ranging from 3.2 to 5.1 points (\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0&lt;\u00a0.001).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>\n                      The 10\u2010item\n                      <jats:styled-content style=\"fixed-case\">PFS<\/jats:styled-content>\n                      physical fatigability score is a valid and reliable measure of perceived fatigability in older adults and can serve as an adjunct to performance\u2010based fatigability measures for identifying older adults at risk of mobility limitation in clinical and research settings.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/jgs.13191","type":"journal-article","created":{"date-parts":[[2014,12,31]],"date-time":"2014-12-31T05:12:56Z","timestamp":1420002776000},"page":"130-135","source":"Crossref","is-referenced-by-count":173,"title":["The Pittsburgh Fatigability Scale for Older Adults: Development and Validation"],"prefix":"10.1111","volume":"63","author":[{"given":"Nancy W.","family":"Glynn","sequence":"first","affiliation":[{"name":"Department of Epidemiology Center for Aging and Population Health Pittsburgh Pennsylvania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Adam J.","family":"Santanasto","sequence":"additional","affiliation":[{"name":"Department of Epidemiology Center for Aging and Population Health Pittsburgh Pennsylvania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eleanor 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