Introducing the fit-criteria assessment plot – A visualisation tool to assist class enumeration in group-based trajectory modelling

绘图(图形) 计算机科学 弹道 可视化 平行坐标 数据挖掘 班级(哲学) 枚举 过程(计算) 数据可视化 人工智能 统计 数学 物理 组合数学 天文 操作系统
作者
S. Klijn,Matty P. Weijenberg,Paul Lemmens,Piet A. van den Brandt,Valéria Lima Passos
出处
期刊:Statistical Methods in Medical Research [SAGE]
卷期号:26 (5): 2424-2436 被引量:38
标识
DOI:10.1177/0962280215598665
摘要

Background and objective Group-based trajectory modelling is a model-based clustering technique applied for the identification of latent patterns of temporal changes. Despite its manifold applications in clinical and health sciences, potential problems of the model selection procedure are often overlooked. The choice of the number of latent trajectories (class-enumeration), for instance, is to a large degree based on statistical criteria that are not fail-safe. Moreover, the process as a whole is not transparent. To facilitate class enumeration, we introduce a graphical summary display of several fit and model adequacy criteria, the fit-criteria assessment plot. Methods An R-code that accepts universal data input is presented. The programme condenses relevant group-based trajectory modelling output information of model fit indices in automated graphical displays. Examples based on real and simulated data are provided to illustrate, assess and validate fit-criteria assessment plot’s utility. Results Fit-criteria assessment plot provides an overview of fit criteria on a single page, placing users in an informed position to make a decision. Fit-criteria assessment plot does not automatically select the most appropriate model but eases the model assessment procedure. Conclusions Fit-criteria assessment plot is an exploratory, visualisation tool that can be employed to assist decisions in the initial and decisive phase of group-based trajectory modelling analysis. Considering group-based trajectory modelling’s widespread resonance in medical and epidemiological sciences, a more comprehensive, easily interpretable and transparent display of the iterative process of class enumeration may foster group-based trajectory modelling’s adequate use.
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