Cochrane Effect Size Calculator

Formula

To calculate the Cochrane Effect Size (ES):

\[ ES = \frac{M_t - M_c}{SD_c} \]

Where:

\(ES\) is the Cochrane effect size
\(M_t\) is the mean of the treatment group
\(M_c\) is the mean of the control group
\(SD_c\) is the standard deviation of the control group

Cochrane Effect Size Definition

The Cochrane effect size is a standardized measure used in meta-analyses and systematic reviews to quantify the difference between two groups, typically a treatment group and a control group. It is a way to express the magnitude of the treatment effect in a way that is independent of the units of measurement. This allows for the comparison of results across different studies and contexts. The Cochrane effect size is particularly useful in the field of evidence-based medicine, where it helps researchers and practitioners to make informed decisions based on the aggregated results of multiple studies.

Example Calculation 1

Let's assume the following values:

Mean of Treatment Group (\(M_t\)) = 70
Mean of Control Group (\(M_c\)) = 50
Standard Deviation of Control Group (\(SD_c\)) = 10

Using the formula:

\[ ES = \frac{70 - 50}{10} = 2.0 \]

The Cochrane Effect Size is 2.0.

Example Calculation 2

Let's assume the following values:

Mean of Treatment Group (\(M_t\)) = 80
Mean of Control Group (\(M_c\)) = 75
Standard Deviation of Control Group (\(SD_c\)) = 5

Using the formula:

\[ ES = \frac{80 - 75}{5} = 1.0 \]

The Cochrane Effect Size is 1.0.