The HTA Workbench
Open calculators for the metrics behind every HTA decision. Enter your own numbers, read the result, and the reasoning behind it.
Biostatistics
Effect measures (2×2)
→Enter a 2×2 table and read RR, OR, risk difference and NNT side by side — each with a plain-language reading.
Pairs with: Measures of effect: RR, OR, RD, NNT
Diagnostic test performance
→Sensitivity, specificity, PPV and NPV from your own counts — and watch PPV shift as disease prevalence changes.
Pairs with: Diagnostic tests
Sample size & power
→Work out the sample size a trial needs — or the power it had — from effect size, alpha and allocation.
Pairs with: Significance and power
Evidence synthesis
Meta-analysis pooler
soonPool several studies into fixed- and random-effects estimates, with a forest plot and I² heterogeneity.
Pairs with: Meta-analysis: pooling
Economic evaluation
Discounting
soonDiscount future costs or QALYs to present value and see how the discount rate reshapes long-term results.
Pairs with: Discounting and the time horizon
QALY builder
soonBuild QALYs from utility values and durations, and see the quality-adjusted life-years as an area under the curve.
Pairs with: The QALY as a construct
DALY calculator
soonBuild DALYs from years of life lost and years lived with disability, and read the disease burden.
Pairs with: The DALY and how it mirrors the QALY
ICER & net benefit
→Compare two options on cost and QALYs. See the ICER, the point on the cost-effectiveness plane, and the verdict against a threshold you set.
Pairs with: The ICER — calculation and interpretation
Modelling & uncertainty
Decision tree (expected value)
soonEnter branch probabilities and payoffs, fold back the tree, and read the expected value of each option.
Pairs with: Decision trees
Markov cohort trace
soonSet transition probabilities and run a cohort through Markov states to accumulate costs and QALYs over time.
Pairs with: Markov models
Tornado (one-way sensitivity)
soonVary one input at a time between low and high values and rank what moves the result in a tornado diagram.
Pairs with: One-way sensitivity analysis & the tornado
PSA + CEAC
soonDraw parameters from distributions, scatter the results on the cost-effectiveness plane, and plot the acceptability curve.
Pairs with: Probabilistic sensitivity analysis
Pricing & access
Value-based price
soonReverse the ICER: from a threshold, QALY gain and comparator cost, find the maximum justifiable price.
Budget impact (BIA)
soonProject the budget impact of a new technology from population, uptake, price and time horizon.
Pairs with: Budget impact: a different question
MCDA weighted scoring
soonScore options against weighted criteria and see the combined multi-criteria result.
More tools coming soon