Bioequivalence and Bioavailability Forum

Loky do
★

Egypt,
2020-10-13 01:38
(1284 d 01:59 ago)

Posting: # 21994
Views: 1,808

statistical calculation procedures for 4 arm studies [General Statistics]

Dears

In case of four way, two sequences, four periods BE study, the 1st two periods done under fasting conditions and the 2nd two periods under fed conditions on the same volunteers, Are the statistical calculations (CI, ANOVA) for each study (fast and fed) calculated separately or not If i need to demonstrate bioequivalence between test & reference products under fast & fed conditions?
Thanks all in advance

Helmut
★★★

Vienna, Austria,
2020-10-13 01:58
(1284 d 01:39 ago)

@ Loky do
Posting: # 21995
Views: 1,460

4 periods (BE fed & fasting)

Post reply

Hi Loky do,

do you mean sumfink like this?
If yes, perform two separate ANOVAs on part 1 (T vs R in fed state: periods 1 & 2) and part 2 (T vs R in fasting state: periods 3 & 4).
To assess the food effects (fed vs fasting) of T and R employ two separate paired comparisons. Here you have to assume no period effects – state that in the protocol. However, you will not loose the war on this if you succeeded in showing BE in fed and fasting state. There are no commonly accepted rules to decide whether food effects are different. In my studies I assess whether the CIs overlap.

Homework: Find out why I recommend fed state first. ;-)

—
Dif-tor heh smusma 🖖🏼 Довге життя Україна!
Helmut Schütz

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

statistical calculation procedures for 4 arm studies [General Sta­tis­tics]

4 periods (BE fed & fasting)

statistical calculation procedures for 4 arm studies [General Statistics]