Construction and assumptions of models should be explicit

doi:10.1136/bmj.39185.472743.3A

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Tom Fahey, professor of general practice and family medicine

Royal College of Surgeons in Ireland Medical School, Mercers Medical Centre, Dublin 2

tomfahey{at}rcsi.ie

The National Institute for health and Clinical Excellence (NICE) uses Markov modelling, a form of decision analysis that models the effectiveness and cost effectiveness of drugs or other medical interventions in a cohort of patients over time.1 2 Construction of a Markov model relies on judgments of …