Researchers are using a retrospective cross-sectional study to examine gender and medication adherence. Which statistical technique?

The paired t-test is used to compare means from the same group at different times or under different conditions. In this case, gender and medication adherence are not paired observations; rather, they are independent categorical variables, which makes the paired t-test unsuitable for this analysis.

While the Mann-Whitney U test is used to compare differences between two independent groups, it is primarily applied to ordinal or continuous data. Since medication adherence is generally treated as a categorical variable (adherent vs. non-adherent), the chi-square test is more appropriate for evaluating the association with gender.

One-way ANOVA is utilized to compare means among three or more independent groups. However, in this scenario, we are not comparing means but rather looking at the association between two categorical variables—gender and medication adherence. Thus, ANOVA does not fit this analytical context.