Abstract
In this article we study sample size calculation methods for the asymptotic van Elteren test. Because the existing methods are only applicable to continuous data without ties, in this article we develop a new method that can be used on ordinal data. The new method has a closed form formula and is very easy to calculate. The new sample size formula performs very well because our simulations show that the corresponding actual powers are close to the nominal powers.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1112-1119 |
| Number of pages | 8 |
| Journal | Journal of Biopharmaceutical Statistics |
| Volume | 18 |
| Issue number | 6 |
| DOIs | |
| State | Published - Nov 2008 |
Keywords
- Adjusting for ties
- Ordinal data
- Power calculation
- Sample size calculation
- Van Elteren test
ASJC Scopus subject areas
- Statistics and Probability
- Pharmacology
- Pharmacology (medical)