Comparative

1. The study involves comparing two or more groups, conditions, or variables.
2. For example, it might compare health outcomes in patients exposed to a particular risk factor versus those who are not, or compare the effectiveness of different treatments.
3. The comparison helps identify differences or associations between groups.

see Comparative study

(Patient, Intervention, Comparative, Outcome, Timing, and Type of study), complemented with a verification of regulatory approval, examination of sample size, quality of patient allocation, maintenance of treatment, and presence of masking techniques