Cohort Studies/Randomized Clinical Trial Calculator

  • Cohort Studies/Randomized Clinical Trial Calculator


    Two-sided significance level (α):
    (Usually 0.05)
    Power (1-β, % chance of detecting):
    (Usually 80)
    Proportion with disease in nonexposed (comparison) group:
    (Between 0.0 and 1.0)

    Ratio of sample size, Nonexposed / Exposed:

    (For equal samples, use 1.0)

    Please fill in one of the following (leave others as zeros)

    Calculated

    Proportion with disease in exposed group:
    (Between 0.0 and 1.0)
    Odds ratio  
    Risk/Prevalence Ratio  
    Risk/Prevalence difference (Between -1.0 and 1.0)

      Kelsey Fleiss Fleiss with CC
     Sample Size - Exposed:

    Sample Size - Nonexposed
    Total sample size

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