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Registerf2 computation (for pts > 85%) - WHO GL [Dissolution / BCS / IVIVC]
Hi jon,
» But if you do end up computing f2 using all pts? What's the harm in that? Isn't it better to conclude based on a complete profile? (meaning stop when plateau is evident. Of course this term plateau is kinda of objective.
No, actually there could be a good reason not to do that.
Consider very early and very late time points. Even if the two curves are shifted, the very early points could be close to zero dissolution, and the very late time points could close to maximum dissolution. for both. Inclusion of (many of) those points in a quantitative comparison will skew the conclusion towards similarity. You absolutely want to assure that you are capturing mainly the "steep" part of the curves. The sexy stuff in dissolution happens right where you are neither very early nor very late.
A comparison of plateau levels say nothing about product performance but just about relative maximum dissolution.
» But if you do end up computing f2 using all pts? What's the harm in that? Isn't it better to conclude based on a complete profile? (meaning stop when plateau is evident. Of course this term plateau is kinda of objective.
No, actually there could be a good reason not to do that.
Consider very early and very late time points. Even if the two curves are shifted, the very early points could be close to zero dissolution, and the very late time points could close to maximum dissolution. for both. Inclusion of (many of) those points in a quantitative comparison will skew the conclusion towards similarity. You absolutely want to assure that you are capturing mainly the "steep" part of the curves. The sexy stuff in dissolution happens right where you are neither very early nor very late.
A comparison of plateau levels say nothing about product performance but just about relative maximum dissolution.
—
Pass or fail!
ElMaestro
Pass or fail!
ElMaestro
Complete thread:
- f2 computation (for pts > 85%) jag009 2018-09-10 18:41 [Dissolution / BCS / IVIVC]
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- f2 computation (for pts > 85%) ElMaestro 2018-09-10 22:52
- f2 computation (for pts > 85%) jag009 2018-09-12 00:00
- f2 computation (for pts > 85%) Obinoscopy 2018-09-11 20:21
- f2 computation (for pts > 85%) jag009 2018-09-12 00:01
- f2 computation (for pts > 85%) - WHO GL Obinoscopy 2018-09-12 00:38
- f2 computation (for pts > 85%) - WHO GL Helmut 2018-09-12 01:01
- f2 computation (for pts > 85%) - WHO GL jag009 2018-09-12 20:35
- f2 computation (for pts > 85%) - WHO GLElMaestro 2018-09-12 22:02
- f2 computation (for pts > 85%) - WHO GL Obinoscopy 2018-09-12 00:38
- f2 computation (for pts > 85%) jag009 2018-09-12 00:01
- f2 computation (for pts > 85%) ElMaestro 2018-09-10 22:52
Ing. Helmut Schütz