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Table 3 Model parameters, data sources and values used in the model.

From: The cost-effectiveness of neonatal screening for Cystic Fibrosis: an analysis of alternative scenarios using a decision model

Utility values of symptom states   
Variable Base case value Range used in sensitivity analysis
Asymptomatic – latea 0.95 0.90
Asymptomatic – earlyb 0.95 0.90
Symptoms (FEV1 – 60%, range 40%–80%) [17,41] 0.75 0.65 – 0.90
Severe irreversible symptoms (FEV1 – 30%, range 20–40%) [17,41] 0.68 0.58 – 0.78
  1. a utility value to reflect "taking regular medication or staying on a prescribed health diet for health reasons" derived from community surveys.
  2. b arbitrary utility weight to reflect the probable repeated visits to GP with undiagnosed CF