What is a repeated cross-sectional study?

In a repeated cross-sectional study, the same population is studied at multiple time points. At each time point, data are collected from a different sample of the population. 

A repeated cross-sectional study is a type of longitudinal study because data are collected repeatedly over a period of time. 

However, as the name suggests, it also resembles a cross-sectional study. Data are obtained from each group of participants at a single time point, and this process is repeated several times.

Repeated cross-sectional studies are helpful for studying changes in a population over time.