Variables Definitions

1. Event 1: The number of occurrences of the event in Group 1.
2. Total 1: The total number of observations in Group 1.
3. Event 2: The number of occurrences of the event in Group 2.
4. Total 2: The total number of observations in Group 2.
5. Confidence Level: The desired confidence level for the confidence interval, is expressed as a decimal (e.g., 0.95 for 95%).

Calculation Formulas

Unadjusted Risk Ratio (RR):

**Formula Reference - Cochrane Handbook**