Psychometric evaluation of a new questionnaire measuring treatment satisfaction in hypothyroidism: The ThyTSQ

Clare Bradley, C McMillan, S Razvi and J Weaver

(2006)

Clare Bradley, C McMillan, S Razvi and J Weaver (2006) Psychometric evaluation of a new questionnaire measuring treatment satisfaction in hypothyroidism: The ThyTSQ. Value in health, 9 (2).

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Abstract

Objective: To demonstrate the application of a Bayesian mixed treatment comparison (MTC) model to synthesize data from clinical trials to inform decisions based on all relevant evidence.

Methods: The value of an MTC model is demonstrated using a probabilistic decision-analytic model developed to assess the cost-effectiveness of second-line chemotherapy in ovarian cancer. Three clinical trials were found that each made a different pair-wise comparison of three treatments of interest in the overall patient population. As no common comparator existed between the three trials, an MTC model was used to assess the combined weight of evidence on survival from all three trials simultaneously. This analysis was compared to an alternative approach that combined two of the trials to make the same comparison of all three treatments using a common comparator, and an informal approach that did not synthesize the available evidence.

Results: By including all three trials using an MTC model, the credible intervals around estimated overall survival were reduced compared with making the same comparison using only two trials and a common comparator. Nevertheless, the survival estimates from the MTC model result in greater uncertainty around the optimal treatment strategy at a cost-effectiveness threshold of £30,000 per quality-adjusted life-year.

Conclusions: MTC models can be used to combine more data than would typically be included in a traditional meta-analysis that relies on a common comparator. They can formally quantify the combined uncertainty from all available evidence, and can be conducted using the same analytical approaches as standard meta-analyses.

Information about this Version

This is a Published version
This version's date is: 03/2006
This item is not peer reviewed

Link to this Version

https://repository.royalholloway.ac.uk/items/db4a0401-56c4-2cb7-9413-86220b0a7996/1/

Item TypeJournal Article
TitlePsychometric evaluation of a new questionnaire measuring treatment satisfaction in hypothyroidism: The ThyTSQ
AuthorsBradley, Clare
McMillan, C
Razvi, S
Weaver, J
Uncontrolled Keywordstreatment, hypothyroidism, questionnaire
DepartmentsFaculty of Science\Psychology

Identifiers

doi10.1111/j.1524-4733.2006.00090.x

Deposited by () on 23-Dec-2009 in Royal Holloway Research Online.Last modified on 12-May-2010


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