确定身体活动和久坐行为的相关因素有助于发现未来行为改变干预的可靶向因素。本研究旨在确定近期被诊断为乳腺癌的个体身体活动和久坐行为的社会认知、人口统计学、临床和与健康相关的相关因素。研究数据来自在阿尔伯塔省乳腺癌康复研究(AMBER)队列研究中进行诊断后90天内的1381名参与者。通过ActiGraph GT3X+®和activPALTM设备连续7天测量个体的身体活动和久坐行为。相关因素通过自报问卷、医疗记录提取或由工作人员测量的方式收集。本研究使用多变量模型拟合久坐行为、轻度身体活动和中至重度身体活动。较高的久坐行为与较高的体脂肪百分比(BF%)（ß=0.044；p<0.001）和单身身份（ß=0.542；p<0.002）相关。较低的轻度身体活动与较高的BF%（β=-0.044；p<0.001）、较高的身体质量指数（ß=-0.039；p<0.001）、更强的疾病障碍影响（ß=-0.006；p<0.001）、HER2阳性诊断（ß=-0.278；p=0.001）和单身身份（ß=-0.385；p=0.001）相关。较低的中至重度身体活动与较高的BF%（ß=-0.011；p=0.001）、更强的疾病障碍影响（ß=-0.002；p<0.001）及亚洲（ß=-0.189；p=0.002）或印度/南美洲血统（ß=-0.189；p=0.002）相关。较高的中至重度身体活动与较高的意向（ß=0.049；p=0.033）和计划（ß=0.026；p=0.015）相关。为近期被诊断为乳腺癌的个体量身定制干预措施可能改善乳腺癌发展过程中的长期结果。© 2023 Springer-Verlag GmbH Germany专属授权给作者，在Springer Nature的一部分。

Identifying correlates of physical activity and sedentary behaviour allows for the identification of factors that may be targeted in future behaviour change interventions. This study sought to determine the social-cognitive, demographic, clinical, and health-related correlates of physical activity and sedentary behaviour in individuals recently diagnosed with breast cancer.Data were collected from 1381 participants within 90 days of diagnosis in the Alberta Moving Beyond Breast Cancer (AMBER) Cohort Study. Physical activity and sedentary behaviour were measured with ActiGraph GT3X+® and activPALTM devices, respectively, for seven consecutive days. Correlates were collected via a self-reported questionnaire, medical record extraction, or measured by staff.Multivariable models were fitted for sedentary behaviour, light physical activity, and moderate-to-vigorous physical activity. Greater sedentary behaviour was associated with higher body fat percentage (BF%) (ß=0.044; p<0.001) and being single (ß=0.542; p<0.002). Lower light physical activity was associated with higher BF% (ß=-0.044; p<0.001), higher body mass index (ß=-0.039; p<0.001), greater disease barrier influence (ß=-0.006; p<0.001), a HER2-positive diagnosis (ß=-0.278; p=0.001), and being single (ß=-0.385; p= 0.001). Lower moderate-to-vigorous physical activity was associated with higher BF% (ß =-0.011; p=0.001), greater disease barrier influence (ß=-0.002; p<0.001), and being of Asian (ß=-0.189; p=0.002) or Indian/South American (ß=-0.189; p=0.002) descent. Greater moderate-to-vigorous physical activity was associated with having greater intentions (ß=0.049; p=0.033) and planning (ß=0.026; p=0.015) towards physical activity.Tailoring interventions to increase physical activity for individuals recently diagnosed with breast cancer may improve long-term outcomes across the breast cancer continuum.© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.