# Sample Size in crossover trials

**URL:** <https://discourse.datamethods.org/t/sample-size-in-crossover-trials/19269>\
**Category:** design\
**Tags:** power, design\
**Created:** [August 23, 2024, 9:40am UTC](https://discourse.datamethods.org/t/sample-size-in-crossover-trials/19269 "2024-08-23T09:40:23Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![trumanfrancis](https://discourse.datamethods.org/user_avatar/discourse.datamethods.org/trumanfrancis/32/47_2.png) [@trumanfrancis](https://discourse.datamethods.org/u/trumanfrancis)\
**Post date:** [August 23, 2024, 9:40am UTC](https://discourse.datamethods.org/t/sample-size-in-crossover-trials/19269/1 "2024-08-23T09:40:24Z")

</div>

Are there any references for calculating sample size in a crossover trial. Thanks

---

<div class="post-metadata">

**Author:** ![f2harrell](https://discourse.datamethods.org/user_avatar/discourse.datamethods.org/f2harrell/32/165_2.png) [@f2harrell](https://discourse.datamethods.org/u/f2harrell)\
**Post date:** [August 23, 2024, 11:38am UTC](https://discourse.datamethods.org/t/sample-size-in-crossover-trials/19269/2 "2024-08-23T11:38:38Z")

</div>

Please add major/minor categories and tags to your post.

---

<div class="post-metadata">

**Author:** ![trumanfrancis](https://discourse.datamethods.org/user_avatar/discourse.datamethods.org/trumanfrancis/32/47_2.png) [@trumanfrancis](https://discourse.datamethods.org/u/trumanfrancis)\
**Post date:** [August 23, 2024, 12:27pm UTC](https://discourse.datamethods.org/t/sample-size-in-crossover-trials/19269/3 "2024-08-23T12:27:10Z")

</div>

I did find this excellent resource: [(9) Power to the difference | LinkedIn](https://www.linkedin.com/pulse/power-difference-stephen-senn/)

It suggests correlation is not needed.

---

<div class="post-metadata">

**Author:** ![trumanfrancis](https://discourse.datamethods.org/user_avatar/discourse.datamethods.org/trumanfrancis/32/47_2.png) [@trumanfrancis](https://discourse.datamethods.org/u/trumanfrancis)\
**Post date:** [August 29, 2024, 12:44am UTC](https://discourse.datamethods.org/t/sample-size-in-crossover-trials/19269/4 "2024-08-29T00:44:26Z")

</div>

[senns.uk/CTiCR/SPlus/Sample.SSC](http://www.senns.uk/CTiCR/SPlus/Sample.SSC)

---

<div class="post-metadata">

**Author:** ![KirovDoc](https://discourse.datamethods.org/user_avatar/discourse.datamethods.org/kirovdoc/32/3178_2.png) [@KirovDoc](https://discourse.datamethods.org/u/KirovDoc)\
**Post date:** [August 29, 2024, 12:23pm UTC](https://discourse.datamethods.org/t/sample-size-in-crossover-trials/19269/5 "2024-08-29T12:23:39Z")

</div>

[https://riskcalc.org/samplesize/](https://riskcalc.org/samplesize/)