{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T03:57:20Z","timestamp":1760241440383,"version":"build-2065373602"},"reference-count":42,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2018,3,16]],"date-time":"2018-03-16T00:00:00Z","timestamp":1521158400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Australian Government Research Training Program Scholarship"},{"name":"National Health and Medical Research Council Project Grant","award":["1010309"],"award-info":[{"award-number":["1010309"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>Descriptions of time use patterns in people with chronic obstructive pulmonary disease (COPD) are scarce and the relationship between use-of-time and COPD severity remains unclear. This study aimed to describe a typical day for people with COPD and to explore the differences in time-use patterns across the Body Mass-Index, Airflow Obstruction, Dyspnoea and Exercise Capacity (BODE) index using compositional analyses. Using a cross-sectional design, 141 adults with clinically stable COPD had their demographics, objective measures of function (pulmonary, exercise capacity and physical activity), and self-reported COPD-related impairment recorded. Daily time-use compositions were derived from 24-h accelerometry and 24-h use-of-time recall interviews. Compositional multiple linear regression models were used to explore the relationship between the BODE index and 24-h time-use compositions. These models were used to predict daily time (min\/d) that is spent in time-use components across the BODE index. The BODE index score was clearly associated with 24-h accelerometry (p &lt; 0.0001) and 24-h use-of-time recall (p &lt; 0.0001) compositions. Relative to the remaining time-use components, higher BODE index scores were associated with greater sedentary behaviour (p &lt; 0.0001), Quiet time (p &lt; 0.0001), Screen time (p = 0.001) and Self-care (p = 0.022), and less daily Chores (p &lt; 0.0001) and Household administration (p = 0.015) time. As the BODE index scores increased, time-use predictions were strongly associated with decreases in Chores (up to 206 min\/d), and increases in Screen (up to 156 min\/d) and Quiet time (up to 131 min\/d). Time\u2013use patterns may provide a basis for planning interventions relative to the severity of COPD.<\/jats:p>","DOI":"10.3390\/ijerph15030533","type":"journal-article","created":{"date-parts":[[2018,3,20]],"date-time":"2018-03-20T06:57:11Z","timestamp":1521529031000},"page":"533","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Patterns of Time Use across the Chronic Obstructive Pulmonary Disease Severity Spectrum"],"prefix":"10.3390","volume":"15","author":[{"given":"Toby","family":"Hunt","sequence":"first","affiliation":[{"name":"Alliance for Research in Exercise, Nutrition and Activity (ARENA), Sansom Institute for Health Research, School of Health Sciences, University of South Australia, City East Campus, North Terrace, Adelaide 5000, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0473-5157","authenticated-orcid":false,"given":"Marie","family":"Williams","sequence":"additional","affiliation":[{"name":"Alliance for Research in Exercise, Nutrition and Activity (ARENA), Sansom Institute for Health Research, School of Health Sciences, University of South Australia, City East Campus, North Terrace, Adelaide 5000, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Timothy","family":"Olds","sequence":"additional","affiliation":[{"name":"Alliance for Research in Exercise, Nutrition and Activity (ARENA), Sansom Institute for Health Research, School of Health Sciences, University of South Australia, City East Campus, North Terrace, Adelaide 5000, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dorothea","family":"Dumuid","sequence":"additional","affiliation":[{"name":"Alliance for Research in Exercise, Nutrition and Activity (ARENA), Sansom Institute for Health Research, School of Health Sciences, University of South Australia, City East Campus, North Terrace, Adelaide 5000, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2018,3,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"932","DOI":"10.1183\/09031936.04.00014304","article-title":"Standards for the diagnosis and treatment of patients with COPD: A summary of the ATS\/ERS position paper","volume":"23","author":"Celli","year":"2004","journal-title":"Eur. 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