Sample Size Calculator for Comparing Paired Proportions

  • Provides live interpretations.
  • Assesses the influence of changing input values.
  • Adjusts sample sizes for continuity and clustering.

Input Values

Select one of the two options for specifying input values. Hover over the sign to obtain help.

  0.25
  0.35
  0.30


  0.15
  0.30

    Note: You may change the default options for Power, Significance, Alternate Hypothesis and Group Sizes by clicking the 'Options' button. Click the 'Adjust' button to adjust sample sizes for continuity (option applied by default), clustering and response rate.


Influence of Changing Input values on Sample Size Estimates

Customize Visualisation

Customize the plot by changing input values from here.

From Min
To Max
By
1st Series
2nd Series
3rd Series

Note: You may change the default options for Power, Significance, Alternate Hypothesis and Group Sizes by clicking the 'Options' button. Click the 'Adjust' button below to adjust sample sizes for continuity (option applied by default), clustering and response rate.

Visualisation

This is a plot of sample sizes (number of pairs) for a range of proportions (Pre) and difference between proportions (Post - Pre). Customize the plot by changing input values from the 'Customize Visualisation' panel.

Download Figure

Table of Sample Sizes at a range of Expected Discordant Proportions.

Customize Table

Customize the table by changing input values from here.

From Min
To Max
By
From Min
To Max
By

Note: You may change the default options for Power, Significance, Alternate Hypothesis and Group Sizes by clicking the 'Options' button. Click the 'Adjust' button below to adjust sample sizes for continuity (option applied by default), clustering and response rate.

Sample Size Table

This table shows sample sizes (pairs) for a range of expected paired proportions. Customize the table by changing input values from the 'Customize Table' pane.

Download Table