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Physical inactivity was defined according to sedentary time, as a percentage of accelerometry wear time with activity of &lt;100\u00a0counts\/min; participants in the top quartile of sedentary time were classified as having a high sedentary time. Sleep\u2013wake disturbances were evaluated using the Insomnia Severity Index (\n                      <jats:styled-content style=\"fixed-case\">ISI<\/jats:styled-content>\n                      ) (range 0\u201328; \u22658 defined insomnia), Epworth Sleepiness Scale (\n                      <jats:styled-content style=\"fixed-case\">ESS<\/jats:styled-content>\n                      ) (range 0\u201324; \u226510 defined daytime drowsiness), Pittsburgh Sleep Quality Index (\n                      <jats:styled-content style=\"fixed-case\">PSQI<\/jats:styled-content>\n                      ) (range 0\u201321; &gt;5 defined poor sleep quality), and Berlin Questionnaire (high risk of sleep apnea).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Prevalence rates were 43.5% for slow gait speed and 44.7% for moderate to severe mobility impairment, with 77.0% of accelerometry wear time spent as sedentary time. Prevalence rates were 33.0% for insomnia, 18.1% for daytime drowsiness, 47.8% for poor sleep quality, and 32.9% for high risk of sleep apnea. Participants with insomnia had a mean\n                      <jats:styled-content style=\"fixed-case\">ISI<\/jats:styled-content>\n                      score of 12.1, those with daytime drowsiness had a mean\n                      <jats:styled-content style=\"fixed-case\">ESS<\/jats:styled-content>\n                      score of 12.5, and those with poor sleep quality had a mean\n                      <jats:styled-content style=\"fixed-case\">PSQI<\/jats:styled-content>\n                      score of 9.2. In adjusted models, measures of mobility and physical inactivity were generally not associated with sleep\u2013wake disturbances, using continuous or categorical variables.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>In a large sample of sedentary community\u2010dwelling elderly adults with functional limitations, sleep\u2013wake disturbances were prevalent but only mildly severe and were generally not associated with mobility impairment or physical inactivity.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/jgs.12845","type":"journal-article","created":{"date-parts":[[2014,6,2]],"date-time":"2014-06-02T18:09:06Z","timestamp":1401732546000},"page":"1064-1072","source":"Crossref","is-referenced-by-count":19,"title":["Sleep\u2013Wake Disturbances in Sedentary Community\u2010Dwelling Elderly Adults with Functional Limitations"],"prefix":"10.1111","volume":"62","author":[{"given":"Carlos A.","family":"Vaz Fragoso","sequence":"first","affiliation":[{"name":"Clinical Epidemiology Research Center Veterans Affairs Connecticut West Haven Connecticut"},{"name":"Department of Medicine School of Medicine Yale University New Haven Connecticut"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael E.","family":"Miller","sequence":"additional","affiliation":[{"name":"Department of Biostatistical Sciences Wake Forest University Winston\u2010Salem North Carolina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Roger A.","family":"Fielding","sequence":"additional","affiliation":[{"name":"Nutrition, Exercise Physiology and Sarcopenia Laboratory Jean Mayer U.S. Department of Agriculture Human Nutrition Research Center on Aging Tufts University Boston Massachusetts"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abby C.","family":"King","sequence":"additional","affiliation":[{"name":"Stanford Prevention Research Center Department of Medicine School of Medicine Stanford University Stanford California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephen B.","family":"Kritchevsky","sequence":"additional","affiliation":[{"name":"Sticht Center on Aging School of Medicine Wake Forest University Winston\u2010Salem North Carolina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mary M.","family":"McDermott","sequence":"additional","affiliation":[{"name":"Feinberg School of Medicine Northwestern University Chicago Illinois"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Valerie","family":"Myers","sequence":"additional","affiliation":[{"name":"Pennington Biomedical Research Center Louisiana State University Baton Rouge Louisiana"},{"name":"Klein Buendel Inc. 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