Source: wikibot/time-varying-covariate
= Time-varying covariate
{wiki=Time-varying_covariate}
A time-varying covariate is a variable that can change over time and is included in statistical models to account for its potential impact on the outcome of interest. Unlike time-invariant covariates, which remain constant throughout the observation period for each individual or unit (such as gender or ethnicity), time-varying covariates can take on different values at different points in time.