Mullane Sarah L, Toledo Meynard J L, Rydell Sarah A, Feltes Linda H, Vuong Brenna, Crespo Noe C, Pereira Mark A, Buman Matthew P
School of Nutrition and Health Promotion, College of Health Solutions, Arizona State University, 425 North 5th Street, Phoenix, AZ, 85004, USA.
Division of Epidemiology and Community Health, University of Minnesota, 1300 S. 2nd Street, Minneapolis, MN, 55454, USA.
Int J Behav Nutr Phys Act. 2017 Aug 31;14(1):117. doi: 10.1186/s12966-017-0576-x.
To identify social ecological correlates of objectively measured workplace sedentary behavior.
Participants from 24 worksites - across academic, industrial, and government sectors - wore an activPAL-micro accelerometer for 7-days (Jan-Nov 2016). Work time was segmented using daily logs. Sedentary behavior outcomes included time spent sitting, standing, in light intensity physical activity (LPA, stepping cadence <100 steps/min), and in prolonged sitting bouts (>30 min). Outcomes were standardized to an 8 h work day. Two electronic surveys were completed to derive individual (job type and work engagement), cultural (lunch away from the desk, walking at lunch and face-to-face interaction), physical (personal printer and office type) and organizational (sector) factors. Mixed-model analyses with worksite-level clustering were performed to examine multi-level associations. Secondary analyses examined job type and sector as moderators of these associations. All models were adjusted for age, race/ethnicity and gender.
Participants (N = 478; 72% female; age: 45.0 ± 11.3 years; 77.8% non-Hispanic white) wore the activPAL-micro for 90.2 ± 15.5% of the reported workday. Walking at lunch was positively associated with LPA (5.0 ± 0.5 min/8 h, P < 0.001). Regular face-to-face interaction was negatively associated with prolonged sitting (-11.3 ± 4.8 min/8 h, P < 0.05). Individuals in private offices sat more (20.1 ± 9.1 min/8 h, P < 0.05), stood less (-21.5 ± 8.8 min/8 h, P < 0.05), and engaged in more prolonged sitting (40.9 ± 11.2 min/8 h, P < 0.001) than those in public office space. These associations were further modified by job type and sector.
Work-specific individual, cultural, physical and organizational factors are associated with workplace sedentary behavior. Associations vary by job type and sector and should be considered in the design of workplace interventions to reduce sedentary behavior.
Clinical trial No. NCT02566317 ; Registered Sept 22nd 2015.
确定客观测量的工作场所久坐行为的社会生态相关因素。
来自学术、工业和政府部门的24个工作场所的参与者佩戴activPAL微型加速度计7天（2016年1月至11月）。使用每日日志对工作时间进行分段。久坐行为结果包括坐着、站立、进行轻度身体活动（LPA，步频<100步/分钟）和长时间坐着（>30分钟）所花费的时间。结果按8小时工作日进行标准化。完成了两项电子调查，以得出个人（工作类型和工作投入度）、文化（不在办公桌前吃午餐、午餐时步行和面对面互动）、物理（个人打印机和办公类型）和组织（部门）因素。进行了带有工作场所层面聚类的混合模型分析，以检验多层次关联。二级分析将工作类型和部门作为这些关联的调节因素进行了检验。所有模型均针对年龄、种族/族裔和性别进行了调整。
参与者（N = 478；72%为女性；年龄：45.0±11.3岁；77.8%为非西班牙裔白人）在报告工作日的90.2±15.5%的时间内佩戴activPAL微型加速度计。午餐时步行与轻度身体活动呈正相关（5.0±0.5分钟/8小时，P < 0.001）。定期面对面互动与长时间坐着呈负相关（-11.3±4.8分钟/8小时，P < 0.05）。与在公共办公空间的人相比，在私人办公室工作的人坐着的时间更长（20.1±9.1分钟/8小时，P < 0.05），站立的时间更短（-21.5±8.8分钟/8小时，P < 0.05），并且长时间坐着的时间更多（40.9±11.2分钟/8小时，P < 0.001）。这些关联因工作类型和部门而进一步有所不同。
特定于工作的个人、文化、物理和组织因素与工作场所久坐行为相关。关联因工作类型和部门而异，在设计减少久坐行为的工作场所干预措施时应予以考虑。
临床试验编号NCT02566317；2015年9月22日注册。
