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- Article] The reliability and internal consistency of an Internet-capable computer program for measuring utilities
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DocNo of ILP: 6876
Doc. Type: Article
Title: The reliability and internal consistency of an Internet-capable computer program for measuring utilities
Authors: Lenert, LA
Full Name of Authors: Lenert, LA
Keywords by Author: cost-benefit analysis; decision making-computer assisted; preferences; quality of life
Keywords Plus: ULCERATIVE-COLITIS; COST-EFFECTIVENESS; HEALTH STATES; DECISION; ELICITATIONS; PREFERENCES; OUTCOMES; VALIDITY; WEB
Abstract: Objective: The purpose of this study was to assess the reliability and internal consistency of measurements of utilities performed with a computer program (iMPACT2) designed for Internet surveys and Internet patient decision-support systems. Methods: We implemented the Internet Multimedia Preference Assessor Construction Tool, version 2 (iMPACT2) program using the combination of a web server, HTML files, and a web-accessible database. The program randomized subjects, screened their responses for missing data and failures of internal consistency, assisted patients with resolving certain inconsistencies, and, upon a subject's completion of the protocol, provided a report of results to the research assistant administering the program. To validate the iMPACT2 program, we recruited 60 healthy community volunteers and elicited preferences in a research-lab setting using a visual analog scale (VAS) and the standard gamble (SG) for subject's current health and three hypothetical states. For purposes of comparison, we also administered a Short Form-12 (SF-12) health-assessment questionnaire. Subjects used the computer software on two occasions separated by 2-4 weeks of time. Results: Visual analog scale and standard gamble ratings for subjects' current health were reliable (intraclass correlation coefficient (ICC) of 0.82 and 0.84 (two outliers excluded - 0.60 without exclusions), respectively) were comparable with the reliability of the Physical and Mental Component scales of the SF-12 (ICCs of 0.84 and 0.75, respectively). Subjects could easily discriminate between hypothetical states (D scores 0.74 for SG and 0.90 for VAS), and 94% had a completely internally consistent ordering of preference ratings for states. Conclusions: iMPACT2 produces measurements of standard gamble utilities that are reliable and have a high degree of internal consistency. Procedures for assessment of utilities developed for desktop computer programs can be translated to software designed for the Internet, facilitating the use of utilities and endpoints in clinical trials and development of web-based decision-support applications for patients. However, further testing, including direct comparisons with traditional interviewer administered utility elicitation protocols, is needed.
Cate of OECD: Health sciences
Year of Publication: 2000
Business Area: gamble
Detail Business: gamble
Country: Netherlands
Study Area:
Name of Journal: QUALITY OF LIFE RESEARCH
Language: English
Country of Authors: Vet Affairs Med Ctr, Sect Hlth Serv Res, San Diego, CA 92161 USA; Univ Calif San Diego, Dept Med, San Diego, CA 92103 USA
Press Adress: Lenert, LA (reprint author), Vet Affairs Med Ctr, Sect Hlth Serv Res, 111N1,3350 La Jolla Village Dr, San Diego, CA 92161 USA.
Email Address:
Citaion:
Funding:
Lists of Citation: Bala MV, 1998, J CLIN EPIDEMIOL, V51, P667, DOI 10.1016/S0895-4356(98)00036-5; BENNETT KJ, 1996, QUALITY LIFE PHARMAC, P235; Cher DJ, 1997, J AM MED INFORM ASSN, V4, P301; Clarke AE, 1997, QUAL LIFE RES, V6, P169; Dolan P, 1996, J HEALTH ECON, V15, P209, DOI 10.1016/0167-6296(95)00038-0; ECKMAN MH, 1995, JAMA-J AM MED ASSOC, V273, P712, DOI 10.1001/jama.273.9.712; FROBERG DG, 1989, J CLIN EPIDEMIOL, V42, P459, DOI 10.1016/0895-4356(89)90136-4; GAGE BF, 1995, JAMA-J AM MED ASSOC, V274, P1839, DOI 10.1001/jama.274.23.1839; Giesler RB, 1999, MED CARE, V37, P580, DOI 10.1097/00005650-199906000-00007; GOLD M, 1996, COST EFFECTIVENESS H, P101; Kattan M W, 1999, Proc AMIA Symp, P296; Lee TT, 2000, J PSYCHIAT RES, V34, P201, DOI 10.1016/S0022-3956(00)00009-1; LENERT L, 2000, P AMIA S S, V20, P1172; Lenert L, 2000, MED CARE, V38, P138; Lenert L A, 1995, Proc Annu Symp Comput Appl Med Care, P319; Lenert LA, 1999, MED DECIS MAKING, V19, P473, DOI 10.1177/0272989X9901900415; Lenert LA, 1997, MED CARE, V35, P915, DOI 10.1097/00005650-199709000-00004; Lenert LA, 1999, MED CARE, V37, P479, DOI 10.1097/00005650-199905000-00007; Lenert LA, 1998, MED DECIS MAKING, V18, P76, DOI 10.1177/0272989X9801800115; Lenert L. A., 1995, Nineteenth Annual Symposium on Computer Applications in Medical Care. Toward Cost-Effective Clinical Computing. Proceedings; NEASE RF, 1995, JAMA-J AM MED ASSOC, V273, P1185, DOI 10.1001/jama.273.15.1185; Sanders GD, 1999, MED DECIS MAKING, V19, P157, DOI 10.1177/0272989X9901900206; Scott G C, 1997, Proc AMIA Annu Fall Symp, P769; Soetikno RM, 1997, AM J GASTROENTEROL, V92, P457; Soetikno RM, 1997, J AM MED INFORM ASSN, V4, P426; Sugar CA, 1998, HEALTH SERV RES, V33, P911; SUMNER W, 1991, S COMP APPL MED CAR, P701; Von Neumann J., 1953, THEORY GAMES EC BEHA; Ware JE, 1996, MED CARE, V34, P220, DOI 10.1097/00005650-199603000-00003
Number of Citaion: 29
Publication: KLUWER ACADEMIC PUBL
City of Publication: DORDRECHT
Address of Publication: SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS
ISSN: 0962-9343
29-Character Source Abbreviation: QUAL LIFE RES
ISO Source Abbreviation: Qual. Life Res.
Volume: 9
Version: 7
Start of File: 811
End of File: 817
DOI: 10.1023/A:1008933720016
Number of Pages: 7
Web of Science Category: Health Care Sciences & Services; Health Policy & Services; Public, Environmental & Occupational Health
Subject Category: Health Care Sciences & Services; Public, Environmental & Occupational Health
Document Delivery Number: 401AF
Unique Article Identifier: WOS:000166904200003
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