Question

In terms of a cohort study,

- Can they use restriction and matching to control confounding at the design stage?

- Are standardization, stratification, and multivariable methods all used at this phase for cohort studies?

Answer 1

Yes, in order to control the confounding variables at the design stage- matching and restriction can be used in cohorts study. Restriction involves restricting participants[with confounding factor] to participate in the study. Matching makes the equal distribution of confounding variables within groups and individuals.

Yes, the techniques of standardization, stratification, and multivariable methods can be utilized at this phase. Standardization will ensure getting objective data. Stratification will help in dividing data into subsets. The multivariable analysis helps in studying many DV and IV.