0.95 or 1.05 [Power / Sample Size]

posted by Helmut Homepage – Vienna, Austria, 2018-10-10 11:41 (869 d 15:47 ago) – Posting: # 19428
Views: 20,358

Hi Oleg,

» […] can you explain your message to my colleagues in russian here

Interesting thread (as far as Google-translate took me). IIRC, some posters were not sure whether to use an assumed T/R-ratio of 0.95 or 1.05. Have a look at this post and that one. In short, if you assume a 5% difference but are not (very!) sure about the direction of the deviation (lower or higher than 100%), a study powered for 0.95 will always be sufficiently powered for 1.05 as well but not the other way ’round.

Dif-tor heh smusma 🖖
Helmut Schütz
[image]

The quality of responses received is directly proportional to the quality of the question asked. 🚮
Science Quotes

Complete thread:

Activity
 Admin contact
21,356 posts in 4,458 threads, 1,493 registered users;
online 14 (0 registered, 14 guests [including 1 identified bots]).
Forum time: Friday 03:29 UTC (Europe/Vienna)

Those who make no mistakes are making the biggest mistakes of all 
they are attempting nothing new.    Anthony de Mello

The Bioequivalence and Bioavailability Forum is hosted by
BEBAC Ing. Helmut Schütz
HTML5