Institute of Sport, Physical Activity and Leisure, Centre of Active Lifestyles, Leeds Beckett University, Headingley Campus, Leeds, LS6 3QS, UK; MoreLife (UK) Ltd., Churchwood Hall, Leeds Beckett University, Headingley Campus, Leeds, LS6 3QJ, UK.
Institute of Sport, Physical Activity and Leisure, Centre of Active Lifestyles, Leeds Beckett University, Headingley Campus, Leeds, LS6 3QS, UK.
Public Health. 2017 Nov;152:79-85. doi: 10.1016/j.puhe.2017.07.025. Epub 2017 Sep 1.
Current research in the field of childhood weight management (WM) effectiveness is hampered by inconsistent terminology and criterion for WM programme completion, alongside other engagement-related concepts (e.g. adherence, dropout and attrition). Evidence reviews are not able to determine conclusive intervention effectiveness because of this issue. This study aims to quantify how various completion criterion impacts upon on: 1) the percentage of WM completers; 2) the standardised body mass index (BMI SDS) reduction; and 3) the predictors of WM completion.
A methodological, sensitivity analysis to examine how differential completion criterion affect programme outcomes and predictors.
Secondary data of 2948 children were used. All children attended a MoreLife WM programme between 2009 and 2014. The completion criterion was incrementally adjusted by 10% (i.e. completer attends 10%, 20%, 30%... of sessions) for research aims 1-2, with the percentage of completers and change in BMI SDS calculated at each increment. For aim 3, the stability (strength, direction and significance) of the predictors were examined when using the completion criterion of four alternative studies against our previous study (completion ≥70% attendance).
The volume of programme completers decreased in a linear manner as the completion criterion became more stringent (i.e. 70-100% attendance). The change in BMI SDS conversely became incrementally greater. The strength, direction and significance of the predictors was highly dependent on the completion criterion; the odds ratio varied by 24.2% across a single predictor variable (delivery period). The degree of change is evidenced in the paper.
Inconsistent completion criterion greatly limits the synthesis of programme effectiveness and explains some of the inconsistency in the predictors of engagement. Standardised criterion for engagement-related terminology are called for.
目前，儿童体重管理（WM）效果的研究受到术语不一致和 WM 项目完成标准的限制，以及其他与参与相关的概念（如依从性、辍学和流失）。由于这个问题，证据审查无法确定干预措施的有效性。本研究旨在量化各种完成标准如何影响：1）WM 完成者的百分比；2）标准化体重指数（BMI SDS）降低；3）WM 完成的预测因素。
一种方法学、敏感性分析，用于检查不同的完成标准如何影响项目结果和预测因素。
使用了 2948 名儿童的二级数据。所有儿童均参加了 2009 年至 2014 年的 MoreLife WM 计划。为了研究目的 1-2，完成标准逐渐调整了 10%（即完成者参加 10%、20%、30%……的课程），在每次递增时计算完成者的百分比和 BMI SDS 的变化。对于研究目的 3，当使用四个替代研究的完成标准（完成≥70%的出勤率）与我们之前的研究相比时，检验预测因素的稳定性（强度、方向和显著性）。
随着完成标准变得更加严格（即 70-100%的出勤率），完成项目的人数呈线性下降。BMI SDS 的变化则逐渐增加。预测因素的强度、方向和显著性高度依赖于完成标准；单一预测变量（交付期）的比值比变化了 24.2%。在论文中可以看到这种变化程度。
不一致的完成标准极大地限制了项目效果的综合分析，并解释了一些与参与相关的预测因素的不一致性。需要制定与参与相关术语的标准化标准。
