Unadjusted Risk Difference (RD) CALCULATOR

By inputting the counts of events and totals for each group, this calculator quickly computes the risk difference (RD) along with its confidence interval, Z-score, and p-value.

OR

Calculate & Input

upload

If you want to convert or calculate data for more than one study at the same time, enter data for study 1, study 2, study 3, ...etc, RESPECTIVELY across all cells using the same order.

Conversion Results

Study ID Event 1 Total 1 Event 2 Total 2 C Level RD CI Start CI End Z P-value

Description of the formula

Variables Definitions

  1. Event 1: The number of events in Group 1.
  2. Total 1: The total number of participants in Group 1.
  3. Event 2: The number of events in Group 2.
  4. Total 2: The total number of participants in Group 2.
  5. Confidence Level: The desired confidence level for the calculation, often chosen as 90%, 95%, or 99%.

For more details about these variables and used formulas, read the full article.