What is the best way to do a sub-group analysis for a variable that was not the part of matching process for the main matched cohort?

14 April 2020 0 7K Report

For example: main cohort is cases matched with controls by age and sex. The sub-group analysis is to be conducted for a co morbidity such as cardiovascular disease. The distribution of this co morbidity is not similar between matched case and controls.

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