I received comments from a reviewer on my manuscript having RCT design and I compared pre and post data by pair t- test. The reviewer commented:
Effect size indices and 95%CI could be presented.
What it means and how can I present it?
Any sample article or help
Thank you
The reviewer suggests incorporating effect size indices, like Cohen's d, and their 95% confidence intervals alongside your pair t-test results in the RCT manuscript. Effect size indices quantify the practical significance, with Cohen's d offering a standardized measure based on the mean difference and standard deviation. Including 95% confidence intervals provides a range for the true effect size. This additional information enhances the interpretation of your findings, offering readers a more nuanced understanding of both statistical and practical significance in the pre-post data comparison.
There are broad meaning of effect size. In your case, I think it refers to the mean difference between the pre and post intervention. The 95% CI will validates the difference if value of 0 difference included or not within the range.