Observed Area Under the Curve Percent Back Extrapolation

**Semantic type:** Quantitative Concept

**Definition:** The percentage of the area under the curve (AUC) extrapolated to infinity that was due to back extrapolation to estimate concentration at time zero, based upon observed values.

**Synonyms:** - AUC %Back Extrapolation Obs - AUC %Back Extrapolation Obs - AUCPBEO