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Characterization and Valuation of the Uncertainty of Calibrated Parameters in Microsimulation Decision Models

Journal Article · · Frontiers in Physiology
 [1];  [2];  [3];  [3];  [4]
  1. Center for Research and Teaching in Economics (CIDE) (Mexico)
  2. Massachusetts General Hospital, Boston, MA (United States)
  3. Argonne National Laboratory (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States)
  4. Univ. of Minnesota, Minneapolis, MN (United States). School of Public Health

We evaluated the implications of different approaches to characterize the uncertainty of calibrated parameters of microsimulation decision models (DMs) and quantified the value of such uncertainty in decision making. We calibrated the natural history model of CRC to simulated epidemiological data with different degrees of uncertainty and obtained the joint posterior distribution of the parameters using a Bayesian approach. We conducted a probabilistic sensitivity analysis (PSA) on all the model parameters with different characterizations of the uncertainty of the calibrated parameters. We estimated the value of uncertainty of the various characterizations with a value of information analysis. We conducted all analyses using high-performance computing resources running the Extreme-scale Model Exploration with Swift (EMEWS) framework. The posterior distribution had a high correlation among some parameters. The parameters of the Weibull hazard function for the age of onset of adenomas had the highest posterior correlation of -0.958. When comparing full posterior distributions and the maximum-a-posteriori estimate of the calibrated parameters, there is little difference in the spread of the distribution of the CEA outcomes with a similar expected value of perfect information (EVPI) of $$\$$$$653 and $$\$$$$685, respectively, at a willingness-to-pay (WTP) threshold of $$\$$$$66,000 per quality-adjusted life year (QALY). Ignoring correlation on the calibrated parameters’ posterior distribution produced the broadest distribution of CEA outcomes and the highest EVPI of $$\$$$$809 at the same WTP threshold. Different characterizations of the uncertainty of calibrated parameters affect the expected value of eliminating parametric uncertainty on the CEA. Ignoring inherent correlation among calibrated parameters on a PSA overestimates the value of uncertainty.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
2469484
Journal Information:
Frontiers in Physiology, Journal Name: Frontiers in Physiology Vol. 13; ISSN 1664-042X
Publisher:
Frontiers Media S.A.Copyright Statement
Country of Publication:
United States
Language:
English

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