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Sensitivity analysis on CL or V #283
I performed the sensitivity analysis on CL/F and V for a pediatric PBPK model (for a small molecule) to find important input parameters that affect CL prediction.
Wouldn't it be more accurate to use absolute clearance (e.g. mL/min) in the sensitivity analysis to remove the effect of weight?
It happened to me in the past. And I have been advised to look at the dose. Was the dose weight normalized (mg/kg) and did you look at total plasma CL? If so, increasing the fat volume will decrease the dose, and therefore the AUC and as consequence, you will see an increase in CL (but it is a dose effect and not a CL effect because total plasma CL is derived from AUC).