T/R ratio for estimation of sample size in BE study of NTI drugs [Power / Sample Size]
Salam to all,
Pease, advise me about what is the best T/R ratio to be used for estimating sample size for a BE study of NTI drugs? knowing that the GL to be followed set the 90% CI acceptance range to (90-111.11) for Cmax if a "2x2x2" design be followed.
I'm confused to use T/R ratio of 0.95 or 0.975?!
Greetings.
Pease, advise me about what is the best T/R ratio to be used for estimating sample size for a BE study of NTI drugs? knowing that the GL to be followed set the 90% CI acceptance range to (90-111.11) for Cmax if a "2x2x2" design be followed.
I'm confused to use T/R ratio of 0.95 or 0.975?!
+++++++++++ Equivalence test - TOST +++++++++++
Sample size estimation
-----------------------------------------------
Study design: 2x2 crossover
log-transformed data (multiplicative model)
alpha = 0.05, target power = 0.8
BE margins = 0.9 ... 1.1111
True ratio = 0.95, CV = 0.0945
Sample size (total)
n power
40 0.808788
+++++++++++ Equivalence test - TOST +++++++++++
Sample size estimation
-----------------------------------------------
Study design: 2x2 crossover
log-transformed data (multiplicative model)
alpha = 0.05, target power = 0.8
BE margins = 0.9 ... 1.1111
True ratio = 0.975, CV = 0.0945
Sample size (total)
n power
20 0.820356
Greetings.
—
Mahmoud Teaima, PhD.
Mahmoud Teaima, PhD.
Complete thread:
- T/R ratio for estimation of sample size in BE study of NTI drugsmahmoud-teaima 2017-10-24 19:18 [Power / Sample Size]
- T/R ratio for estimation of sample size in BE study of NTI drugs Helmut 2017-10-24 23:15
- T/R ratio for estimation of sample size in BE study of NTI drugs ElMaestro 2017-10-25 12:34
- T/R ratio for estimation of sample size in BE study of NTI drugs nobody 2017-10-26 14:03
- Defaults in PowerTOST d_labes 2017-10-26 14:49
- T/R ratio for estimation of sample size in BE study of NTI drugs nobody 2017-10-26 14:03
- T/R ratio for estimation of sample size in BE study of NTI drugs ElMaestro 2017-10-25 12:34
- T/R ratio for estimation of sample size in BE study of NTI drugs Helmut 2017-10-24 23:15