Sydney Musculoskeletal Health, Kolling Institute of Medical Research, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia.
School of Health Sciences, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia.
Physiother Res Int. 2022 Oct;27(4):e1966. doi: 10.1002/pri.1966. Epub 2022 Jul 13.
To determine how physically active individuals are following total knee replacement (TKR) and how accurately they self-report their step count adherence compared to objective measure following TKR.
Observational cohort study, nested within the PATHway randomised-clinical trial. Participants (n = 102) who had recently undergone TKR were recruited for the main trial. Only participant data from the intervention group were used for this study (n = 51). Participants in the intervention group received an activity tracker to monitor their physical activity and fortnightly health-coaching sessions for 3 months. Adherence was objectively measured as percentage of steps completed divided by the amount prescribed by the health coach. Participants were asked to self-report their adherence on a 1-10 numerical rating scale during health coaching sessions.
Data from 44 participants were available, resulting in a total of 224 paired measurements. Participant step count increased over the first 8 weeks of follow-up, and plateaued from 8 weeks onwards at approximately 7500 steps/day. About two-thirds (65.8%) of participants accurately self-reported their step count adherence up until 12 weeks, the remaining one-third (34.2%) underestimated their adherence. Paired t-tests demonstrated statistically significant differences between the paired measurements from weeks 2 to 10.
Participants were generally active and completed the step goal most occasions. Two-thirds accurately self-reported their step goal adherence. Self-reported measures should be combined with an objective measure of adherence for greater accuracy. A further understanding of how people engage with activity trackers can be used to promote behaviour change in physiotherapy-led interventions.
确定全膝关节置换（TKR）后个体的身体活动水平以及他们自我报告的步数依从率与 TKR 后客观测量的准确性相比如何。
观察性队列研究，嵌套于 PATHway 随机临床试验中。招募了最近接受 TKR 的参与者参加主要试验。本研究仅使用干预组的参与者数据（n=51）。干预组的参与者使用活动追踪器来监测他们的身体活动，并接受为期 3 个月的每两周一次的健康教练辅导。依从性通过完成的步数除以健康教练规定的数量的百分比来客观测量。参与者在健康教练辅导期间被要求在 1-10 的数字评分量表上自我报告他们的依从率。
44 名参与者的数据可用，共获得 224 对测量值。参与者的步数在随访的前 8 周内增加，并从第 8 周开始稳定在每天约 7500 步。大约三分之二（65.8%）的参与者在 12 周之前准确地自我报告了他们的步数依从率，其余三分之一（34.2%）低估了他们的依从率。配对 t 检验显示从第 2 周到第 10 周的配对测量值之间存在统计学显著差异。
参与者通常很活跃，大多数情况下都能完成目标步数。三分之二的人准确地自我报告了他们的目标步数依从率。自我报告的测量值应与依从性的客观测量值结合使用，以提高准确性。进一步了解人们如何使用活动追踪器可以用于促进物理治疗干预中的行为改变。
