Sample Size from Interaction study [Power / Sample Size]
Thanks Helmut,
I back-computed the intra-CV from the single dose interaction study and it was 13-14%. I decided to go with 20% CV as the basis for my sample size estimation. I hope that's not an overkill...
Another question, for truncated AUC0-72 hours, what is your experience in terms of setting the limit for 72 hr blood draw time deviation? The drug has a half-life of 20-30 hours. The clinic allows the subjects to return for the 72 hour return blood draw with a +4 hour time limit (i.e, if they come back after 76 hours then they will not collect it).
Is that a bit too late? I would either set the limit to 1 hour or keep the subject for 72 hours in house.
Thanks
John
I back-computed the intra-CV from the single dose interaction study and it was 13-14%. I decided to go with 20% CV as the basis for my sample size estimation. I hope that's not an overkill...
Another question, for truncated AUC0-72 hours, what is your experience in terms of setting the limit for 72 hr blood draw time deviation? The drug has a half-life of 20-30 hours. The clinic allows the subjects to return for the 72 hour return blood draw with a +4 hour time limit (i.e, if they come back after 76 hours then they will not collect it).
Is that a bit too late? I would either set the limit to 1 hour or keep the subject for 72 hours in house.
Thanks
John
Complete thread:
- Sample Size from Interaction study jag009 2012-05-10 16:14 [Power / Sample Size]
- Sample Size from Interaction study Helmut 2012-05-10 16:42
- Sample Size from Interaction studyjag009 2012-05-10 19:39
- Uncertainty of CVs; AUC72 - actual vs. nominal time Helmut 2012-05-11 15:13
- Uncertainty of CVs; AUC72 - actual vs. nominal time jag009 2012-05-11 16:36
- Uncertainty of CVs; AUC72 - actual vs. nominal time Helmut 2012-05-11 17:35
- Uncertainty of CVs; AUC72 - actual vs. nominal time jag009 2012-05-11 18:13
- Uncertainty of CVs; AUC72 - actual vs. nominal time Helmut 2012-05-11 17:35
- Uncertainty of CVs; AUC72 - actual vs. nominal time jag009 2012-05-11 16:36
- Uncertainty of CVs; AUC72 - actual vs. nominal time Helmut 2012-05-11 15:13
- Sample Size from Interaction studyjag009 2012-05-10 19:39
- Sample Size from Interaction study Helmut 2012-05-10 16:42
