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 for 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. You may also adjust the calculated sample size for continuity correction or clustering using the 'Adjust' button.

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. You may also adjust the calculated sample size for continuity correction or clustering using the 'Adjust' button.

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. You may also adjust the calculated sample size for continuity correction or clustering using the 'Adjust' button.

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