Reliability, minimal detectable change and responsiveness to change: Indicators to select the best method to measure sedentary behaviour in older adults in different study designs.
Reliability, minimal detectable change and responsiveness to change: Indicators to select the best method to measure sedentary behaviour in older adults in different study designs.
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DOI：
10.1371/journal.pone.0195424
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发表时间：
2018
期刊：
影响因子：
3.7
通讯作者：
Seniors USP Team
中科院分区：
文献类型：
--
作者：
Dontje ML;Dall PM;Skelton DA;Gill JMR;Chastin SFM;Seniors USP Team
久坐行为（SB）与健康状况不佳有关。目前尚不清楚哪种SB测量方法最适合用于干预和人口监测，以测量和解释老年人的行为变化。本研究的目的是：检验老年人血沉测量的主观和客观方法的相对可靠性和绝对可靠性、最小可检测变化（minimum Detectable Change， MDC）和对变化的响应性，并提出不同研究设计的使用建议。研究人员对18名年龄为71岁的老年人进行了为期14天的SB评估，采用了一套系统的主观工具（来自自报告久坐行为分类工具（TASST））和一套客观工具（activPAL3c）。计算了每个不同工具的相对信度（类内相关系数- icc）、绝对信度（SEM）、MDC和相对响应性（Cohen 's效应大小（ES）和Guyatt 's响应系数（GR）），并对不同的研究设计进行了排名。ICC范围为0.414至0.946，SEM范围为36.03至137.01 min， MDC范围为1.66至8.42小时，ES范围为0.017至0.259，GR范围为0.024至0.485。在临床实践环境中，客观的每周平均一天的测量是最有效的，而在准实验、纵向和对照试验研究设计中，一天的测量是最高的。在所有的研究设计中，电视观看-前一周回忆（PWR）被评为最具反应性的主观测量。主观和客观测量SB方法的信度、最小可检测变化和对变化的反应性与情境有关。虽然电视观看- pwr在大多数情况下是更可靠和反应灵敏的主观方法，但它作为总SB的可靠测量可能存在局限性。本研究的结果可用于指导在人口监测，干预评估和个人护理背景下检测老年人久坐行为变化的工具选择。
Prolonged sedentary behaviour (SB) is associated with poor health. It is unclear which SB measure is most appropriate for interventions and population surveillance to measure and interpret change in behaviour in older adults. The aims of this study: to examine the relative and absolute reliability, Minimal Detectable Change (MDC) and responsiveness to change of subjective and objective methods of measuring SB in older adults and give recommendations of use for different study designs. SB of 18 older adults (aged 71 (IQR 7) years) was assessed using a systematic set of six subjective tools, derived from the TAxonomy of Self report Sedentary behaviour Tools (TASST), and one objective tool (activPAL3c), over 14 days. Relative reliability (Intra Class Correlation coefficients-ICC), absolute reliability (SEM), MDC, and the relative responsiveness (Cohen’s d effect size (ES) and Guyatt’s Responsiveness coefficient (GR)) were calculated for each of the different tools and ranked for different study designs. ICC ranged from 0.414 to 0.946, SEM from 36.03 to 137.01 min, MDC from 1.66 to 8.42 hours, ES from 0.017 to 0.259 and GR from 0.024 to 0.485. Objective average day per week measurement ranked as most responsive in a clinical practice setting, whereas a one day measurement ranked highest in quasi-experimental, longitudinal and controlled trial study designs. TV viewing–Previous Week Recall (PWR) ranked as most responsive subjective measure in all study designs. The reliability, Minimal Detectable Change and responsiveness to change of subjective and objective methods of measuring SB is context dependent. Although TV viewing-PWR is the more reliable and responsive subjective method in most situations, it may have limitations as a reliable measure of total SB. Results of this study can be used to guide choice of tools for detecting change in sedentary behaviour in older adults in the contexts of population surveillance, intervention evaluation and individual care.
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