Cross-sectional analysis of 1 age refers to collecting and analyzing data of people of different ages at the same time point and comparing their differences and changes.

This analysis method can obtain data of different age groups in a short time, which is convenient for comparative analysis.

However, because this method only considers the data at the same time point and cannot reflect the change of age with time, it is necessary to combine other analysis methods to make a comprehensive analysis when studying some problems.