Measurement of the validity of utility elicitations performed by computerized interview

Title

Measurement of the validity of utility elicitations performed by computerized interview

Creator

Lenert LA; Morss S; Goldstein MK; Bergen MR; Faustman WO; Garber AM

Publisher

Medical Care

Date

1997

Subject

Humans; Adult; Aged; Middle Aged; Choice Behavior; Patient Satisfaction; Reproducibility of Results; adolescent; Non-U.S. Gov't; P.H.S.; Research Support; U.S. Gov't; Nonparametric; Statistics; Akathisia; Drug-Induced/etiology; Antipsychotic Agents/adverse effects; Dyskinesia; Interviews/standards; Multimedia/standards; Parkinson Disease; Schizophrenia/drug therapy; Schizophrenic Psychology; Secondary/chemically induced

Description

OBJECTIVES: The authors evaluate a measure of the validity of utility elicitations and study the potential effects of invalid elicitations on population utility values. METHODS: The authors used a computerized survey to describe and measure preferences for three common side-effects of anti-psychotic drugs (tardive dyskinesia [TD], akathesia [AKA], pseudo-parkinsonism). The authors compared the validity of elicitations in 41 healthy volunteers to 22 schizophrenic patients. Preferences were measured using visual analog scale (VAS), pair-wise comparison (PWC), and the Standard Gamble (SG) methods. To assess the validity of each groups' responses, the authors compared the consistency of subjects' rank-order of the desirability of states across methods of preferences assessment (CAMPA). RESULTS: All healthy volunteers and 82% of patients completed the computer survey; of these subjects, 97% of healthy volunteers and 70% of patients indicated they thought they understood the task required of them. However, only 78% of healthy subjects and 44% of patients had a consistent rank ordering of preferences among VAS and PWC ratings; only 80% and 61%, respectively, had a consistent rank ordering preferences among SG and PWC ratings. For two of the three health states, inconsistent subjects had statistically higher SG utilities (for TD, 0.94 versus 0.87, and for AKA 0.92 versus 0.86; P < 0.05). CONCLUSIONS: The CAMPA test can identify potentially invalid preference ratings. Potentially invalid preference ratings may bias the "population" utilities for health states.
1997

Rights

Article information provided for research and reference use only. PedPalASCNET does not hold any rights over the resource listed here. All rights are retained by the journal listed under publisher and/or the creator(s).

Type

Journal Article

Citation List Month

Backlog

Pages

915-920

Issue

9

Volume

35

Citation

Lenert LA; Morss S; Goldstein MK; Bergen MR; Faustman WO; Garber AM, “Measurement of the validity of utility elicitations performed by computerized interview,” Pediatric Palliative Care Library, accessed January 20, 2022, https://pedpalascnetlibrary.omeka.net/items/show/11980.

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