Changelog

meddecide 0.0.31.84 (2025-10-03)

decisioncombine(): New function for systematic evaluation of diagnostic test combinations
- Analyzes all possible test result patterns (2-test: 4 patterns, 3-test: 8 patterns)
- Calculates sensitivity, specificity, PPV, NPV, and accuracy for each pattern combination
- Identifies optimal testing strategies based on Youden’s J index
- Includes visualization options: bar charts, heatmaps, forest plots, and decision trees
- Supports filtering by statistic type and pattern type
- Can add test pattern column to dataset for further analysis
cotest(): New function for analyzing combined results of two concurrent diagnostic tests
- Calculates post-test probabilities for various scenarios (either positive, both positive, both negative)
- Supports both parallel and serial testing strategies
- Provides Fagan nomogram visualizations
sequentialtests(): New function for sequential testing analysis
- Analyzes how diagnostic accuracy changes when applying two tests in sequence
- Compares three different testing strategies: serial positive (confirmation), serial negative (exclusion), and parallel testing
- Provides comprehensive analysis including population flow, cost implications, and Fagan nomograms
decisioncalculator(): New calculator for diagnostic test evaluation
- Designed for when you have the four key counts: TP, FP, TN, FN
- Calculates comprehensive diagnostic performance metrics
- Supports confidence interval estimation and Fagan nomogram visualization

decisioncompare(): Major improvements to test comparison functionality
- Enhanced comparison plots (bar charts and radar plots)
- Added statistical comparison using McNemar’s test
- New summary and explanation options for better interpretation
- Added manuscript-ready report sentence generation
- Improved handling of custom prevalence settings
- Better visualization of confidence intervals for metric differences

decisionpanel(): Function removed for future redesign
- Users should use decisioncombine() and decisioncompare() instead
- These new functions provide more focused and comprehensive analysis