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RegisterSample size calculations: SAS vs PowerTOST/FARTSSIE [Power / Sample Size]
Dear all,
As also mentioned in other threads in the forum, sample sizes (and power) calculated with SAS are frequently different than calculated with (freely available) software, e.g. PowerTOST for R and FARTSSIE for Excel, specialized for (2x2) BE (which I definitely trust more; SAS is like a black box).
At the moment, we are having a discussion with a CRO on sample size calculations and which software to use. I have recommended PowerTOST and FARTSSIE, but they want to stick with SAS (because “they have always used it”
). This would be fine with me as long as all calculations match, but they do not.
How can I convince the CRO to also look into the possibilities of using other software besides SAS and that sample sizes calculated with SAS are not (always) the "correct" approximations? And, what to do with (how to approach) different outcomes (SAS vs others)?
Thanks in advance!
Best regards,
Oiinkie
As also mentioned in other threads in the forum, sample sizes (and power) calculated with SAS are frequently different than calculated with (freely available) software, e.g. PowerTOST for R and FARTSSIE for Excel, specialized for (2x2) BE (which I definitely trust more; SAS is like a black box).
At the moment, we are having a discussion with a CRO on sample size calculations and which software to use. I have recommended PowerTOST and FARTSSIE, but they want to stick with SAS (because “they have always used it”
). This would be fine with me as long as all calculations match, but they do not.How can I convince the CRO to also look into the possibilities of using other software besides SAS and that sample sizes calculated with SAS are not (always) the "correct" approximations? And, what to do with (how to approach) different outcomes (SAS vs others)?
Thanks in advance!
Best regards,
Oiinkie
—
Regards,
Oiinkie
Regards,
Oiinkie
Complete thread:
- Sample size calculations: SAS vs PowerTOST/FARTSSIEOiinkie 2011-12-06 14:30
![[Mix]](https://static.bebac.at/img/mix.png "open in Mix view")
- Sample size calculations: SAS vs PowerTOST/FARTSSIE Helmut 2011-12-06 14:49
- Sample size calculations: SAS vs PowerTOST/FARTSSIE Oiinkie 2011-12-07 15:57
- The power not to know vs PowerTOST/FARTSSIE/... d_labes 2011-12-12 15:38
- Paired designs not that uncommon Helmut 2011-12-12 17:05
- Paired designs not that uncommon ElMaestro 2011-12-13 17:04
- Off topic: software validation Helmut 2011-12-13 18:10
- Off topic: software validation ElMaestro 2011-12-13 20:30
- Off topic: software validation Helmut 2011-12-14 14:14
- Discovery of Owen's Q in SAS d_labes 2011-12-14 15:34
- Off topic: software validation ElMaestro 2011-12-13 20:30
- Off topic: software validation Helmut 2011-12-13 18:10
- Paired designs not that uncommon ElMaestro 2011-12-13 17:04
- Paired designs in PowerTOST 0.9-0 Helmut 2011-12-19 20:05
- Paired designs not that uncommon Helmut 2011-12-12 17:05
- The power not to know vs PowerTOST/FARTSSIE/... d_labes 2011-12-12 15:38
- Sample size calculations: SAS vs PowerTOST/FARTSSIE Oiinkie 2011-12-07 15:57
- Sample size calculations: SAS vs PowerTOST/FARTSSIE Helmut 2011-12-06 14:49
Ing. Helmut Schütz