ParCC - Parameter Converter and Calculator for Health Technology
Assessment
An interactive 'shiny' application for Health Technology
Assessment (HTA) parameter estimation. Converts between rates,
probabilities, odds, and hazard ratios (HR); extrapolates
survival curves (Exponential, Weibull, Log-Logistic); fits
probabilistic sensitivity analysis (PSA) distributions (Beta,
Gamma, LogNormal, Dirichlet) via the method of moments;
calculates incremental cost-effectiveness ratios (ICERs), net
monetary benefit (NMB), value-based pricing, and budget impact;
adjusts costs for inflation, discounting, and purchasing power
parity (PPP) across 30 countries; and adjusts background
mortality using life-table methods. Designed for researchers
building cost-effectiveness and budget-impact models who need
auditable, formula-documented parameter transformations.
Methods include Zhang and Yu (1998)
<doi:10.1001/jama.280.19.1690> for odds ratio (OR) to relative
risk (RR) conversion and Chinn (2000, Statistics in Medicine,
19, 3127-3131) for effect-size transformations.
