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Standard deviation

Interquartile range

Correlation coefficient

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Calculate the Change in Mean and SD from the Baseline

By providing the means and standard deviations before and after an event, along with the correlation coefficient, you can calculate the mean change and SD change.

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Calculate & Input

Mean (pre):

Standard Deviation (Pre):

Mean (post):

Standard Deviation (Post):

C.C (Correlation Coefficient): (If not found, enter zero)

Study ID	Mean (pre)	SD (pre)	Mean (post)	SD (post)	C.C	Mean Change	SD Change

Conversion Results

Study ID	Mean (pre)	SD (pre)	Mean (post)	SD (post)	C.C	Mean Change	SD Change
1	20	10	25	12	0.8	5	3

Description of the formula

Variables Definitions

Confidence Interval (CI): This represents the confidence level expressed as a decimal value. For example, 0.95 corresponds to a 95% confidence interval.
Number of Participants: The total number of individuals or data points in the sample or study.
Upper CI Limit: The upper limit of the confidence interval.
Lower CI Limit: The lower limit of the confidence interval.
Standard Deviation (SD): The calculated standard deviation based on the provided confidence interval information.

Conversion Formula

Calculation of the standard errors wide

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