ncar (version 0.3.1)

NCA: Noncompartmental analysis for a dataset with multiple subjects

Description

conduct noncompartmental analysis for many subjects in a data table

Usage

NCA(Data, colSubj, colTime, colConc, colTrt, Method = "Linear", Dose = 0,
  AdmMode = "Extravascular", TimeInfusion = 0, Report = "Table", iAUC)

Arguments

Data

name of data table containing time-concentration data of multiple subjects

colSubj

column name for subject ID

colTime

column name for the time

colConc

column name for the concentration

colTrt

column name for the treatment code. This is useful for crossover study like bioequivalence trial.

Method

one of "Linear" or "Log" to indicate the way to calculate AUC

Dose

administered dose. One should be careful for the unit. This can be a vector containing dose for each subject in order.

AdmMode

one of "Bolus" or "Infusion" or "Extravascular" to indicate drug administration mode

TimeInfusion

infusion duration for constant infusion, otherwise 0. This can be a vector containing values for each subject in order.

Report

either of "Table" or "Text" to specify the type of return value

iAUC

data.frame with three columns, "Name", "Start", "End" to specify partial interval AUC

Value

CMAX

maximum concentration, Cmax

CMAXD

dose normalized Cmax, CMAX / Dose, Cmax / Dose

TMAX

time of maximum concentration, Tmax

TLAG

time to observe the first non-zero concentration, for extravascular administration only

CLST

last positive concentration observed, Clast

CLSTP

last positive concentration predicted, Clast_pred

TLST

time of last positive concentration, Tlast

LAMZHL

half-life by lambda z, ln(2)/LAMZ

LAMZ

lambda_z negative of best fit terminal slope

LAMZLL

earliest time for LAMZ

LAMZUL

last time for LAMZ

LAMZNPT

number of points for LAMZ

CORRXY

correlation of log(concentration) and time

R2

R-squared

R2ADJ

R-squared adjusted

C0

back extrapolated concentration at time 0, for bolus intravascular administration only

AUCLST

AUC from 0 to TLST

AUCALL

AUC using all the given points, including trailing zero concentrations

AUCIFO

AUC infinity observed

AUCIFOD

AUCIFO / Dose

AUCIFP

AUC infinity predicted using CLSTP instead of CLST

AUCIFPD

AUCIFP / Dose

AUCPEO

AUC % extrapolation observed

AUCPEP

AUC % extrapolated for AUCIFP

AUCPBEO

AUC % back extrapolation observed, for bolus IV administration only

AUCPBEP

AUC % back extrapolation predicted with AUCIFP, for bolus IV administration only

AUMCLST

AUMC to the TLST

AUMCIFO

AUMC infinity observed using CLST

AUMCIFP

AUMC infinity determined by CLSTP

AUMCPEO

AUMC % extrapolated observed

AUMCPEP

AUMC % extrapolated predicted

MRTIVLST

mean residence time (MRT) to TLST, for intravascular administration

MRTIVIFO

mean residence time (MRT) infinity using CLST, for intravascular administration

MRTIVIFP

mean residence time (MRT) infinity using CLSTP, for intravascular administration

MRTEVLST

mean residence time (MRT) to TLST, for extravascular administration

MRTEVIFO

mean residence time (MRT) infinity using CLST, for extravascular administration

MRTEVIFP

mean residence time (MRT) infinity using CLSTP, for extravascular administration

VZO

volume of distribution determined by LAMZ and AUCIFO, for intravascular administration

VZP

volume of distribution determined by LAMZ and AUCIFP, for intravascular administration

VZFO

VZO for extravascular administration, VZO/F, F is bioavailability

VZFP

VZP for extravascular administration, VZP/F, F is bioavailability

CLO

clearance using AUCIFO, for intravascular administration

CLP

clearance using AUCIFP, for intravascular administration

CLFO

CLO for extravascular administration, CLO/F, F is bioavailability

CLFP

CLP for extravascular administration, CLP/F, F is bioavailability

VSSO

volume of distribution at steady state using CLST, for intravascular administration only

VSSP

volume of distribution at stead state using CLSTP, for intravascular administration only

Details

This function calls IndiNCA repeatedly to do NCA for each subject. If you specify Report="Text", this function returns in free text format to be used in a report file.

References

1. Gabrielsson J, Weiner D. Pharmacokinetic and Pharmacodynamic Data Analysis - Concepts and Applications. 5th ed. 2016.
2. Shargel L, Yu A. Applied Biopharmaceutics and Pharmacokinetics. 7th ed. 2015.
3. Rowland M, Tozer TN. Clinical Pharmacokinetics and Pharmacodynamics - Concepts and Applications. 4th ed. 2011.
4. Gibaldi M, Perrier D. Pharmacokinetics. 2nd ed. revised and expanded. 1982.

See Also

IndiNCA

Examples

# Theoph and Indometh data: dose in mg, conc in mg/L, time in h
NCA(Theoph, "Subject", "Time", "conc", Dose=320)
NCA(Indometh, "Subject", "time", "conc", Dose=25, AdmMode="Bolus")

iAUC = data.frame(Name=c("AUC[0-12h]","AUC[0-24h]"), Start=c(0,0), End=c(12,24)) ; iAUC
NCA(Theoph, "Subject", "Time", "conc", Dose=320, iAUC=iAUC)
NCA(Indometh, "Subject", "time", "conc", Dose=25, AdmMode="Bolus", iAUC=iAUC)

writeLines(NCA(Theoph, "Subject", "Time", "conc", Dose=320, Report="Text"),
           "Theoph_Linear_CoreOutput.txt")
writeLines(NCA(Theoph, "Subject", "Time", "conc", Dose=320, Method="Log", Report="Text"),
           "Theoph_Log_CoreOutput.txt")
writeLines(NCA(Indometh, "Subject", "time", "conc", Dose=25, AdmMode="Bolus", Report="Text"),
           "Indometh_Bolus_Linear_CoreOutput.txt")
writeLines(NCA(Indometh, "Subject", "time", "conc", Dose=25, AdmMode="Bolus", Method="Log",
           Report="Text"), "Indometh_Bolus_Log_CoreOutput.txt")
writeLines(NCA(Indometh, "Subject", "time", "conc", Dose=25, AdmMode="Infusion", TimeInfusion=0.25,
           Report="Text"), "Indometh_Infusion_Linear_CoreOutput.txt")
writeLines(NCA(Indometh, "Subject", "time", "conc", Dose=25, AdmMode="Infusion", TimeInfusion=0.25,
           Method="Log", Report="Text"), "Indometh_Infusion_Log_CoreOutput.txt")