Скачать или смотреть Sample size calculation for cohort study || comparison between exposed and unexposed group

Sometimes we need to calculate sample size based on cohort study to test the hypothesis comparing the significance difference between exposed and unexposed group. Here the example outcome is anemia.

In this situation, we can apply this formula. We have to input the values, where expected value of prevalence will be used according to hypothesis as well as literature review.
Generally, we use z square value of 1.96 at 5 % level of significance and power 90%. Based on the 90% power, the z beta value 1.28

On top of that, we can write these texts in our proposal and provide this table with explanation. Then it will be better to read for researcher.





The main topics of this channel are given below:
Sample size calculation
Data management in STATA and SPSS
Advance data analysis
Epidemiology