you need to check age and sex

Dear experts,

I am trying to compare 2 groups with 2 covariates (age, sex) using qdec.

After loading data, design tab displays "diagnosis" in discrete, "age" and "sex" in both continuous (covariates) and nuisance factor boxes.

I just selected "diagnosis" and click "analyze". Is this a right way to remove effects by age and sex?

Otherwise, do I need to check age and sex in nuisance factor box?

Thank you so much.

Park

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