Agreement Statistics by Dr. Lawrence Lin

This web tool computes Lin’s agreement statistics for continuous data when the error structure is assummed constant (absolute difference) or proportional (% change). Agreement statistics include concordance correlation coefficient (CCC), precision and accuracy coefficients, total deviation index (TDI), coverage probability (CP), and their one sided confidence limits. They are computed when target values are random or fixed. It also produces the agreement plot around the concordance line.

Created by Dr. Lawrence Lin using the Python function converted from validated SAS macro, based on materials in Chapter 2 of Statistical Tools for Measuring Agreement, Springer, 2012 by Lin et al.

To use the tool, enter values for all parameters and upload your data using the first button on the left. Agreement statistics and plot will be presented. You may interactively update the results by changing values of parameters. Close and relaunch the tool for each new data set. Note that when the TDI allowance is set too large, you might get an error about s_T because the CP values is 1 and its standard error is zero.

Services

Service Overview

Discover the core capabilities of our statistical agreement tool, designed to deliver precise insights and improve your data analysis workflow.

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Comprehensive Agreement Metrics

Calculate concordance correlation coefficient, total deviation index, and coverage probability with ease to assess measurement agreement accurately.

Interactive Data Visualization

Visualize your results through dynamic agreement plots that help interpret complex data relationships effectively.

Flexible Data Handling

Supports both absolute differences and percentage changes, accommodating diverse analytical needs for continuous data.

Explore Advanced Agreement Statistics

Discover how our tool streamlines your statistical agreement analysis.

Concordance Correlation Coefficient

Calculate the CCC to assess reproducibility between continuous measurements.

Coverage Probability Analysis

Evaluate the likelihood that differences stay within acceptable limits.

Precision and Accuracy Coefficients

Measure consistency and closeness of your data effectively.

Total Deviation Index (TDI)

Quantify allowable measurement deviations with interactive visualizations.

How It Works

Discover how to upload your data, configure agreement parameters, and analyze results with interactive visualizations for precise statistical insights.

Step One: Upload Your Data

Begin by importing your continuous data set, ensuring it’s formatted correctly to enable accurate agreement statistic calculations.

Step Two: Set Parameters

Customize your analysis by selecting the appropriate coefficients and choosing between absolute or percentage difference options.

Step Three: Visualize Results

Review interactive agreement plots and summary statistics to interpret the concordance and agreement measures effectively.

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