Hazard Ratio Calculator

The Hazard Ratio Calculator can be used to compare the risk of an event occurring in two groups over time.

Input Parameters

Calculation Results

Calculation Formula

Hazard Ratio (HR) = (Events in Treatment / At Risk in Treatment) / (Events in Control / At Risk in Control)

Where:
Events in Treatment = Number of events in the treatment group
At Risk in Treatment = Number at risk at start in the treatment group
Events in Control = Number of events in the control group
At Risk in Control = Number at risk at start in the control group

Result

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Hazard Ratio Calculator Usage Guide

Learn how to use the Hazard Ratio Calculator and its working principles

How to Use the Hazard Ratio Calculator

  1. Enter the number of events that occurred in the treatment group.
  2. Enter the number of people at risk at the start of the treatment group.
  3. Enter the number of events that occurred in the control group.
  4. Enter the number of people at risk at the start of the control group.
  5. Click the "Calculate" button to compute the Hazard Ratio.

Understanding the Hazard Ratio

The Hazard Ratio (HR) is a measure used in survival analysis to compare the risk of an event occurring in two groups over time. An HR greater than 1 indicates a higher risk in the treatment group, while an HR less than 1 indicates a lower risk. An HR of 1 indicates no difference in risk between the groups.