Question

Why it’s important to have good randomization before introducing an intervention when conducting a randomized control trial?

Answer 1

Randomization is the allocation of patients to study groups by chance. The intended function of randomization is to balance known and unknown confounding factors between intervention and control groups, thus minimizing their impact on the relationship between the intervention and the outcomes observed. Although the majority of RCTs apply patient-level randomization (whereby each patient is individually randomized to a group), this approach poses challenges for studying certain interventions.

The randomized controlled trial (RCT) is regarded as one of the most valued research methodologies for examining the efficacy or effectiveness of interventions.

Observational (case–control or cohort) studies may suggest the benefit of an intervention, but they are prone to bias. Important and relevant gaps in the scientific knowledge sometimes come to light in the process of developing guidelines, and such gaps need to be addressed by producing robust evidence.

Hence, important to have good randomization before introducing an intervention when conducting a randomized control trial

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