Which of the following is ideal to ensure similarity between experimental & control groups
Correct Answer: Stratified randomization
Description: Stratified randomization: Study population is ‘first stratified’ by each variable which is considered important, and then randomization is done to each treatment groups within each stratum.
- Comparison groups become similar as possible as regards participant characteristics that might influence the response to the intervention
- Equal numbers of participants with a characteristic thought to affect prognosis or response to the intervention will be allocated to each comparison group.
- Stratification increase the likelihood that two groups will be more comparable.
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