powercalc.ca

Calculate:

Sample Size Power

For a primary outcome that is:

Binary

(ex. Death, Hospital Discharge)

Continuous

(ex. Blood Pressure, Lab Values, Height)

Time-to-Event

(ex. Time to Hospitalization)

For trial type:

Superiority Trial

Non-Inferiority Trial

Superiority Trial

Note: This tool is for individual-level Randomized Control Trials (RCTs), not clustered RCTs.

Non-inferiority margin using absolute risk difference:

One-sided significance level or α-value (alpha):

Common/Recommended Value is 0.05

Two-sided significance level or α-value (alpha):

Common/Recommended Value is 0.05

Statistical power or 1-β value (1-beta):

Common/Recommended Value is 0.8

1. Based on available data and literature from other cohort studies or Randomized Control Trials (RCTs).

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