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. 2018 Jan 23;2(1):e3.
doi: 10.2196/formative.8202.

A Computer-Assisted Personal Interview App in Research Electronic Data Capture for Administering Time Trade-off Surveys (REDCap): Development and Pretest

Mark Oremus  1 , Anis Sharafoddini  1 , Gian Paolo Morgano  2 , Xuejing Jin  2   3 , Feng Xie  2   3   4
Affiliations

A Computer-Assisted Personal Interview App in Research Electronic Data Capture for Administering Time Trade-off Surveys (REDCap): Development and Pretest

Mark Oremus et al. JMIR Form Res. .

Erratum in

Abstract

Background: The time trade-off (TTO) task is a method of eliciting health utility scores, which range from 0 (equivalent to death) to 1 (equivalent to perfect health). These scores numerically represent a person's health-related quality of life. Software apps exist to administer the TTO task; however, most of these apps are poorly documented and unavailable to researchers.

Objective: To fill the void, we developed an online app to administer the TTO task for a research study that is examining general public proxy health-related quality of life estimates for persons with Alzheimer's disease. This manuscript describes the development and pretest of the app.

Methods: We used Research Electronic Data Capture (REDCap) to build the TTO app. The app's modular structure and REDCap's object-oriented environment facilitated development. After the TTO app was built, we recruited a purposive sample of 11 members of the general public to pretest its functionality and ease of use.

Results: Feedback from the pretest group was positive. Minor modifications included clarity enhancements, such as rearranging some paragraph text into bullet points, labeling the app to delineate different question sections, and revising or deleting text. We also added a research question to enable the identification of respondents who know someone with Alzheimer's disease.

Conclusions: We developed an online app to administer the TTO task. Other researchers may access and customize the app for their own research purposes.

Keywords: REDCap; computer-assisted personal interview; health-related quality-of-life; time trade-off.

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Conflict of interest statement

Conflicts of Interest: None declared.

Figures

Figure 1
Figure 1
Modular structure of the time trade-off (TTO) app. AD: Alzheimer’s disease; EQ-5D: EuroQol 5-dimension.
Figure 2
Figure 2
Workflow for accessing the time trade-off (TTO) app. REDCap: Research Electronic Data Capture.
Figure 3
Figure 3
Six possible navigation options between Alzheimer's disease (AD) instruments based on mode.
Figure 4
Figure 4
Screenshot of a logical error check for the pop-up text.
Figure 5
Figure 5
Record export dashboard.
Figure 6
Figure 6
Screenshot of a pop-up alert for incorrect free-text entry by end-user for email address.
See this image and copyright information in PMC

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References

    1. International Society for Quality of Life Research. [2017-06-14]. Health-Related Quality of Life Research http://www.isoqol.org/about-isoqol/what-is-health-related-quality-of-lif... .
    1. Drummond M, Sculpher M, Claxton K. Methods for the Economic Evaluation of Health Care Programmes. Fourth Edition. Oxford, UK: Oxford University Press; 2015.
    1. Oppe M, Rand-Hendriksen K, Shah K, Ramos-Goñi JM, Luo N. EuroQol Protocols for Time Trade-Off Valuation of Health Outcomes. Pharmacoeconomics. 2016 Oct;34(10):993–1004. doi: 10.1007/s40273-016-0404-1. http://europepmc.org/abstract/MED/27084198 10.1007/s40273-016-0404-1 - DOI - PMC - PubMed
    1. Torrance GW, Thomas WH, Sackett DL. A utility maximization model for evaluation of health care programs. Health Serv Res. 1972;7(2):118–133. http://europepmc.org/abstract/MED/5044699 - PMC - PubMed
    1. Robinson A, Spencer A. Exploring challenges to TTO utilities: valuing states worse than dead. Health Econ. 2006 Apr;15(4):393–402. doi: 10.1002/hec.1069. - DOI - PubMed