The Pharmacokinetics Concentrations (PC)) and Pharmacokinetics Parameters (PP) domains are based on the Findings General Observation class. The (PC domain is used to represent concentrations of drugs or metabolites in fluids or tissues as a function of time. The PP domain is used to represent pharmacokinetic parameters derived from pharmacokinetic concentration-time (PC) data. PP is a derived dataset.
Measuring a nicotine blood concentration profile, after a person smokes, is a widely used method to quantitate tobacco exposure.
Example
This is an example of a study designed to evaluate plasma nicotine pharmacokinetic (PK) parameters following the use of nicotine. Two different nicotine products were used in the study. Each product was evaluated in a 180-minute test session with 1-3 days in between each product use. Plasma samples were taken at 45, 30, and 15 minutes prior to the start of product use and 2, 4, 7, 10, 15, 20, 30, 40, 50, 60, and 120 minutes after the start of product use. (More time points are often used; these timepoints presented were used only for illustration to save space.)
The PCLLOQ for the analytes measured were reported; PCULOQs were not reported.
Dataset Wrapper Debug Message
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Example
In this PK study, Cmax, time to reach Cmax (tmax), and the baseline-corrected area under the plasma concentration–time curves (i) from start of product use (t0) to the last quantifiable nicotine concentration time point (AUC0-last) and (ii) from t0 to 10 minutes after t0 (AUC0-10’). The pharmacokinetic parameters were derived from plasma nicotine concentrations-versus-time data by means of noncompartmental analysis and corrected for baseline where the baseline (C0) was defined as the average concentration of the 3 time points prior to t0 (45, 30, and 15 minutes prior to t0). The analysis methods for the baseline corrected values were provided in the study protocol.
This example shows the PP parameters calculated from time-concentration profiles for the nicotine for one subject at day 1. Typically, the same PP parameters would be provided for cotinine and NNN but are only shown for TMAX. Note that PPRFTDTC is populated in order to link the PP records to the respective PC records.
Other parameters may be calculated but are not shown. They may include: (1) R2, R Squared; (2) R2ADJ, R Squared Adjusted; (3) AUCIFO, AUC Infinity Obs; (4) AUCPEO, AUC %Extrapolation Obs; (5) AUCTAU, AUC Over Dosing Interval; (6) LAMZNPT, Number of Points for Lambda z; (7) LAMZUL, Lambda z Upper Limit; or (8) LAMZLL, Lambda z Lower Limit. These PP parameters are included in the controlled terminology.
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Please add a row column to your dataset.
Example
Values from ADSL and PP are combined to capture observations that can be summarized. This is just an example and does not mean to indicate that ADPP must be used as the dataset name, nor are the parameters described necessarily those that would be used in a particular study. One item to note is the use of PARQUAL, which will appear in a future version of the ADaM.
ADPP Dataset Metadata
| Dataset | Description | Class | Structure | Purpose | Keys | Location | Documentation |
|---|---|---|---|---|---|---|---|
| ADPP | PP Analysis Data | Basic Data Structure | One record per subject per parameter per analysis visit | Analysis | STUDYID, USUBJID, PARQUAL, PARAMCD, AVISIT, | ADPP.xpt | ADPP.SAS/SAP |
ADPP Variable Metadata
Variable Name | Variable Label | Type | Codelist/Controlled Terms | Core | Notes |
|---|---|---|---|---|---|
| STUDYID | Study Identifier | text | ABC-123 | Req | ADSL.STUDYID |
| USUBJID | Unique Subject Identifier | text | Req | PP.STUDYID | |
| TRTA | Actual Product | text | Product A | Cond | ADSL.TRT01A |
| AVISIT | Analysis Visit | text | Day 1 | Cond | Set to propcase of PP.VISIT |
| PARQUAL | Parameter Qualifier | text | NICOTINE | Perm | PP.PPCAT |
| PARAM | Parameter | text | AUC All (h*ng/mL) Max Conc (ng/mL) Time of CMAX (h) | Req | Assigned |
| PARAMCD | Parameter Code | text | AUCALL CMAX TMAX | Req | Assigned |
| AVAL | Analysis Value | float | Req | PP.PPSTRESN | |
| PPSPEC | Specimen Material Type | text | PLASMA | Perm | PP.PPSPEC |
| PPSEQ | Sequence Number | text | Perm | PP.PPSEQ | |
| PKFL | PK Population Flag | text | Y;N | Cond | ADSL.PKFL |
Overview
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