One in four older adults in Denmark and almost half of the very old above 75 do not meet the World Health Organization’s recommendations for a minimum of physical activity (PA). A cost-efficient and effective way to increase focus on and motivation for daily walking might be to use Physical Activity Monitors (PAMs) in combination with behavioural change intervention. Thus, the objective of this randomized controlled study was to investigate the effect of Motivational Interviewing (MI) as an add-on intervention to a PAM-based intervention measured in community-dwelling older adults. This two-arm parallel group randomized controlled effectiveness trial compared a 12-weeks PAM-based intervention with additional MI (PAM+MI group) with a PAM-based intervention alone (PAM group). The primary outcome, average daily step count, was analysed with a linear regression model, adjusted for sex and baseline daily step count. Following the intention-to-treat principle, multiple imputation based on baseline step count, sex and age was performed. In total, 38 participants were randomized to the PAM intervention and 32 to the PAM+MI intervention arm. During the intervention period, PAM+MI participants walked on average 909 more steps per day than PAM participants, however insignificant (95%CI: − 71; 1889) and reported 2.3 points less on the UCLA Loneliness Scale (95%CI: − 4.5; − 1.24). The use of MI, in addition to a PAM-based intervention among older adults in PA promoting interventions hold a potential clinically relevant effect on physical activity and should thus be investigated further with adequately powered RCTs. This study was pre-registered in the clinicaltrials.gov database with identifier: NCT03906162 .

中文翻译：

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MIPAM 试验——动机访谈和身体活动监测，以提高老年人的日常身体活动水平——一项随机对照试验

丹麦四分之一的老年人和 75 岁以上的高龄者中几乎有一半不符合世界卫生组织关于最低运动量 (PA) 的建议。增加对日常步行的关注和动力的一种具有成本效益且有效的方法可能是将体育活动监测器 (PAM) 与行为改变干预结合使用。因此，这项随机对照研究的目的是调查动机访谈 (MI) 作为对社区老年人测量的基于 PAM 的干预的附加干预的效果。这项双臂平行组随机对照有效性试验将 12 周基于 PAM 的干预与额外的 MI（PAM+MI 组）与仅基于 PAM 的干预（PAM 组）进行了比较。主要结果，平均每日步数，用线性回归模型进行分析，根据性别和基线每日步数进行调整。遵循意向性治疗原则，根据基线步数、性别和年龄进行多重插补。总共有 38 名参与者被随机分配到 PAM 干预组，32 名参与者被随机分配到 PAM+MI 干预组。在干预期间，PAM+MI 参与者平均每天比 PAM 参与者多走 909 步，但无关紧要 (95%CI: − 71; 1889) 并且在 UCLA 孤独量表上报告的少 2.3 分 (95%CI: − 4.5 ; - 1.24)。除了在 PA 促进干预的老年人中使用基于 PAM 的干预之外，MI 的使用对身体活动具有潜在的临床相关影响，因此应通过足够有力的 RCT 进一步研究。该研究已在临床试验中预先注册。