A comparison of methods for analysing compositional data with fixed and variable totals: a simulation study using the examples of time-use and dietary data.

ABSTRACT:

Background

Compositional data comprise the parts of a 'whole' (or 'total'), which sum to that 'whole'. The 'whole' may vary between units of analyses, or it may be fixed (constant). For example, total energy intake (a variable total) is the sum of intake from all foods or macronutrients. Total time in a day (a fixed total) is the sum of time spent engaging in various activities. There exist different approaches to analysing compositional data, such as the isocaloric or isotemporal model, ratio variables, and compositional data analysis (CoDA). Although the performance of the different approaches has been compared previously, this has only been conducted in real data. Since the true relationships are unknown in real data, it is difficult to compare model performance in estimating a

SUBMITTER: Tomova GD 

PROVIDER: S-EPMC12004694 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature