(1) The document discusses different types of data that can be used to compare exposure groups in a cohort study: binary, categorical, and continuous. (2) Binary measures classify subjects into two groups (yes/no), categorical measures classify subjects into two or more ordered or unordered groups, and continuous measures use numerical values that can be averaged. (3) Examples are given of studies measuring palm pilot exposure and brain rot using each type of data: binary (yes/no to palm pilot ownership and brain rot), categorical (severity of brain rot), and continuous (Glasgow Coma scores).