Advanced Analysis of Longitudinal Data Using the Concordance Correlation Coefficient
Akaike and Bayesian Information Criteria for an lcc Object
Compare Likelihoods of Fitted Models from an lcc Object
Internal functions to estimate fixed effects and variance components.
Internal Function to Estimate the Sampled Concordance Correlation Coef...
Internal Function to Compute the Sampled Concordance Correlation Value...
Internal Function to Prepare the ciCompute Function.
Internal Function to Compute the Non-Parametric Bootstrap Interval.
Extract Model Coefficients
Internal Function to Prepare the Dataset for lccObjects
Internal helper to compute LA list for one diffbeta
Internal helper to compute LCC list for one diffbeta
Internal helper to compute LPC list (does not depend on diffbeta)
Internal base theme used by all ggplot-based summaries
Internal helper to precompute longitudinal quantities
Extract Fitted Values from an lcc Object
Internal Function to Build Fitted Values for lcc Objects
Format Columns for Print
Internal Function to Extract Variance Components Estimates.
Extract Variance Components from a Fitted lcc Model
Internal Function to Prepare lccModelFunction
Reports whether x is a lcc object
Internal Function to Estimate the Longitudinal Accuracy (Bias Correcto...
Internal Functions to Compute the Non-Parametric Confidence Intervals ...
Longitudinal concordance correlation (LCC) from polynomial mixed effec...
Internal Function to Estimate the Longitudinal Concordance Correlation
Internal Function to Prepare lcc Objects
Internal function to fit a linear mixed-effects model
Plot Fitted Curves from an lcc Object
Internal Function to Summarize Fitted and Sampled Values for lcc Obj...
Extract Log-Likelihood of an lcc Object
Internal Function to Estimate the Longitudinal Pearson Correlation
Estimate Sampled Pearson Correlation
Internal Function to Prepare the plotBuilder_la Function
Prepare Plot for LPC Function
Diagnostic Plots for an lcc Object
Internal Function to Produces a Longitudinal Accuracy Plot.
Generate a Longitudinal Concordance Correlation Plot
Internal Function to Produce a Longitudinal Pearson Correlation Plot
Control Settings for lcc Plots
Print the Anova of an lcc Object
Print Method for lcc Objects
Print Summary of an lcc Object
Extract Random Effects from an lcc Model
Internal Function to Prepare lccModelFunction
Extract Residuals from a Fitted lcc Model
Summarize an lcc Object
Regular Sequence Generator for Time Variable
Extract Variance-Covariance Matrix of the Fixed Effects for an lcc Obj...
Methods for assessing agreement between repeated measurements obtained by two or more methods using the longitudinal concordance correlation coefficient (LCC). Polynomial mixed-effects models (via 'nlme') describe how concordance, Pearson correlation and accuracy evolve over time. Functions are provided for model fitting, diagnostic plots, extraction of summaries, and non-parametric bootstrap confidence intervals (including parallel computation), following Oliveira et al. (2018) <doi:10.1007/s13253-018-0321-1>.