Evaluation of Surrogate Endpoints in Clinical Trials


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Documentation for package ‘Surrogate’ version 0.1-72

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ARMD Data of the Age-Related Macular Degeneration Study
BifixedContCont Fits a bivariate fixed-effects model to assess surrogacy in the meta-analytic multiple-trial setting (Continuous-continuous case)
BimixedContCont Fits a bivariate mixed-effects model to assess surrogacy in the meta-analytic multiple-trial setting (Continuous-continuous case)
CausalDiagramBinBin Draws a causal diagram depicting the median informational coefficients of correlation (or odds ratios) between the counterfactuals for a specified range of values of the ICA in the binary-binary setting.
CausalDiagramContCont Draws a causal diagram depicting the median correlations between the counterfactuals for a specified range of values of ICA or MICA in the continuous-continuous setting
CIGTS Data of the Collaborative Initial Glaucoma Treatment Study
FixedBinBinIT Fits (univariate) fixed-effect models to assess surrogacy in the binary-binary case based on the Information-Theoretic framework
FixedBinContIT Fits (univariate) fixed-effect models to assess surrogacy in the case where the true endpoint is binary and the surrogate endpoint is continuous (based on the Information-Theoretic framework)
FixedContBinIT Fits (univariate) fixed-effect models to assess surrogacy in the case where the true endpoint is continuous and the surrogate endpoint is binary (based on the Information-Theoretic framework)
FixedContContIT Fits (univariate) fixed-effect models to assess surrogacy in the continuous-continuous case based on the Information-Theoretic framework
FixedDiscrDiscrIT Investigates surrogacy for binary or ordinal outcomes using the Information Theoretic framework
ICA.BinBin Assess surrogacy in the causal-inference single-trial setting in the binary-binary case
ICA.BinBin.CounterAssum ICA (binary-binary setting) that is obtaied when the counterfactual correlations are assumed to fall within some prespecified ranges.
ICA.BinBin.Grid.Full Assess surrogacy in the causal-inference single-trial setting in the binary-binary case when monotonicity for S and T is assumed using the full grid-based approach
ICA.BinBin.Grid.Sample Assess surrogacy in the causal-inference single-trial setting in the binary-binary case when monotonicity for S and T is assumed using the grid-based sample approach
ICA.BinBin.Grid.Sample.Uncert Assess surrogacy in the causal-inference single-trial setting in the binary-binary case when monotonicity for S and T is assumed using the grid-based sample approach, accounting for sampling variability in the marginal pi.
ICA.BinCont Assess surrogacy in the causal-inference single-trial setting in the binary-continuous case
ICA.ContCont Assess surrogacy in the causal-inference single-trial setting (Individual Causal Association, ICA) in the Continuous-continuous case
ICA.Sample.ContCont Assess surrogacy in the causal-inference single-trial setting (Individual Causal Association, ICA) in the Continuous-continuous case using the grid-based sample approach
LongToWide Reshapes a dataset from the 'long' format (i.e., multiple lines per patient) into the 'wide' format (i.e., one line per patient)
MarginalProbs Computes marginal probabilities for a dataset where the surrogate and true endpoints are binary
MaxEntICABinBin Use the maximum-entropy approach to compute ICA in the binary-binary setting
MaxEntSPFBinBin Use the maximum-entropy approach to compute SPF (surrogate predictive function) in the binary-binary setting
MICA.ContCont Assess surrogacy in the causal-inference multiple-trial setting (Meta-analytic Individual Causal Association; MICA) in the continuous-continuous case
MICA.Sample.ContCont Assess surrogacy in the causal-inference multiple-trial setting (Meta-analytic Individual Causal Association; MICA) in the continuous-continuous case using the grid-based sample approach
MinSurrContCont Examine the plausibility of finding a good surrogate endpoint in the Continuous-continuous case
MixedContContIT Fits (univariate) mixed-effect models to assess surrogacy in the continuous-continuous case based on the Information-Theoretic framework
Ovarian The Ovarian dataset
plot Causal-Inference BinBin Plots the (Meta-Analytic) Individual Causal Association and related metrics when S and T are binary outcomes
plot Causal-Inference BinCont Plots the (Meta-Analytic) Individual Causal Association and related metrics when S is continuous and T is binary
plot Causal-Inference ContCont Plots the (Meta-Analytic) Individual Causal Association when S and T are continuous outcomes
plot FixedDiscrDiscrIT Provides plots of trial-level surrogacy in the Information-Theoretic framework
plot Information-Theoretic Provides plots of trial- and individual-level surrogacy in the Information-Theoretic framework
plot Information-Theoretic BinCombn Provides plots of trial- and individual-level surrogacy in the Information-Theoretic framework when both S and T are binary, or when S is binary and T is continuous (or vice versa)
plot MaxEntICA BinBin Plots the sensitivity-based and maximum entropy based Individual Causal Association when S and T are binary outcomes
plot MaxEntSPF BinBin Plots the sensitivity-based and maximum entropy based surrogate predictive function (SPF) when S and T are binary outcomes.
plot Meta-Analytic Provides plots of trial- and individual-level surrogacy in the meta-analytic framework
plot MinSurrContCont Graphically illustrates the theoretical plausibility of finding a good surrogate endpoint in the continuous-continuous case
plot PredTrialTContCont Plots the expected treatment effect on the true endpoint in a new trial (when both S and T are normally distributed continuous endpoints)
plot SPF BinBin Plots the surrogate predictive function (SPF).
plot.BifixedContCont Provides plots of trial- and individual-level surrogacy in the meta-analytic framework
plot.BimixedContCont Provides plots of trial- and individual-level surrogacy in the meta-analytic framework
plot.FixedBinBinIT Provides plots of trial- and individual-level surrogacy in the Information-Theoretic framework when both S and T are binary, or when S is binary and T is continuous (or vice versa)
plot.FixedBinContIT Provides plots of trial- and individual-level surrogacy in the Information-Theoretic framework when both S and T are binary, or when S is binary and T is continuous (or vice versa)
plot.FixedContBinIT Provides plots of trial- and individual-level surrogacy in the Information-Theoretic framework when both S and T are binary, or when S is binary and T is continuous (or vice versa)
plot.FixedContContIT Provides plots of trial- and individual-level surrogacy in the Information-Theoretic framework
plot.FixedDiscrDiscrIT Provides plots of trial-level surrogacy in the Information-Theoretic framework
plot.ICA.BinBin Plots the (Meta-Analytic) Individual Causal Association and related metrics when S and T are binary outcomes
plot.ICA.BinCont Plots the (Meta-Analytic) Individual Causal Association and related metrics when S is continuous and T is binary
plot.ICA.ContCont Plots the (Meta-Analytic) Individual Causal Association when S and T are continuous outcomes
plot.MaxEntICA.BinBin Plots the sensitivity-based and maximum entropy based Individual Causal Association when S and T are binary outcomes
plot.MaxEntSPF.BinBin Plots the sensitivity-based and maximum entropy based surrogate predictive function (SPF) when S and T are binary outcomes.
plot.MICA.ContCont Plots the (Meta-Analytic) Individual Causal Association when S and T are continuous outcomes
plot.MinSurrContCont Graphically illustrates the theoretical plausibility of finding a good surrogate endpoint in the continuous-continuous case
plot.MixedContContIT Provides plots of trial- and individual-level surrogacy in the Information-Theoretic framework
plot.PredTrialTContCont Plots the expected treatment effect on the true endpoint in a new trial (when both S and T are normally distributed continuous endpoints)
plot.Single.Trial.RE.AA Conducts a surrogacy analysis based on the single-trial meta-analytic framework
plot.SPF.BinBin Plots the surrogate predictive function (SPF).
plot.SurvSurv Provides plots of trial- and individual-level surrogacy in the Information-Theoretic framework when both S and T are time-to-event endpoints
plot.TrialLevelIT Provides a plots of trial-level surrogacy in the information-theoretic framework based on the output of the 'TrialLevelIT()' function
plot.TrialLevelMA Provides a plots of trial-level surrogacy in the meta-analytic framework based on the output of the 'TrialLevelMA()' function
plot.TwoStageSurvSurv Plots trial-level surrogacy in the meta-analytic framework when two survival endpoints are considered.
plot.UnifixedContCont Provides plots of trial- and individual-level surrogacy in the meta-analytic framework
plot.UnimixedContCont Provides plots of trial- and individual-level surrogacy in the meta-analytic framework
Pos.Def.Matrices Generate 4 by 4 correlation matrices and flag the positive definite ones
Pred.TrialT.ContCont Compute the expected treatment effect on the true endpoint in a new trial (when both S and T are normally distributed continuous endpoints)
Prentice Evaluates surrogacy based on the Prentice criteria for continuous endpoints (single-trial setting)
RandVec Generate random vectors with a fixed sum
Restrictions.BinBin Examine restrictions in pi_{f} under different montonicity assumptions for binary S and T
Schizo Data of five clinical trials in schizophrenia
Schizo_Bin Data of a clinical trial in Schizophrenia (with binary outcomes).
Schizo_PANSS Longitudinal PANSS data of five clinical trials in schizophrenia
Sim.Data.Counterfactuals Simulate a dataset that contains counterfactuals
Sim.Data.CounterfactualsBinBin Simulate a dataset that contains counterfactuals for binary endpoints
Sim.Data.MTS Simulates a dataset that can be used to assess surrogacy in the multiple-trial setting
Sim.Data.STS Simulates a dataset that can be used to assess surrogacy in the single-trial setting
Sim.Data.STSBinBin Simulates a dataset that can be used to assess surrogacy in the single trial setting when S and T are binary endpoints
Single.Trial.RE.AA Conducts a surrogacy analysis based on the single-trial meta-analytic framework
SPF.BinBin Evaluate the surrogate predictive function (SPF) in the binary-binary setting (sensitivity-analysis based approach)
SurvSurv Assess surrogacy for two survival endpoints based on information theory and a two-stage approach
Test.Mono Test whether the data are compatible with monotonicity for S and/or T (binary endpoints)
TrialLevelIT Estimates trial-level surrogacy in the information-theoretic framework
TrialLevelMA Estimates trial-level surrogacy in the meta-analytic framework
TwoStageSurvSurv Assess trial-level surrogacy for two survival endpoints using a two-stage approach
UnifixedContCont Fits univariate fixed-effect models to assess surrogacy in the meta-analytic multiple-trial setting (continuous-continuous case)
UnimixedContCont Fits univariate mixed-effect models to assess surrogacy in the meta-analytic multiple-trial setting (continuous-continuous case)