Unadjusted Odds Ratio (OR) CALCULATOR

By inputting the counts of events and totals for two groups or conditions, this calculator quickly computes the odds ratio along with its confidence interval, Z-score, and p-value.

OR

Calculate & Input

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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 OR CI Start CI End Z P-Value

Description of the formula

Variables Definitions

  1. Event 1: The number of occurrences of the event in the first group.
  2. Total 1: The total number of observations in the first group.
  3. Event 2: The number of occurrences of the event in the second group.
  4. Total 2: The total number of observations in the second group.
  5. Confidence Level: The desired confidence level for the calculation (e.g., 0.90 for 90%, 0.95 for 95%, 0.99 for 99%).

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