Valuing health status using VAS and TTO: What lies behind the numbers?

Robinson, Andrew; Dolan, Paul; Williams, Angela

doi:10.1016/s0277-9536(97)00057-9

Cited by 140 publications

(117 citation statements)

References 10 publications

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“…However, the same phenomenon regarding the ranking of Dead has been observed when TTO tasks preceded rank/VAS (Tsuchiya et al, 2006). An alternative explanation is that participants might think of rank/VAS as some chronological or logical sequence: we get less healthy, and then we die, so dead is placed at the bottom (Robinson et al, 1997).…”

Section: Discussionmentioning

confidence: 99%

A uniform time trade off method for states better and worse than dead: feasibility study of the ‘lead time’ approach

et al. 2011

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A uniform Time Trade Off method for states better and worse than dead: feasibility study of the 'lead time' approach SummaryThe way Time Trade Off (TTO) values are elicited for states of health considered 'worse than being dead' has important implications for the mean values used in economic evaluation. Conventional approaches to TTO, as used in the UK's 'MVH' value set, are problematic because they require fundamentally different tradeoffs tasks for the valuation of states better and worse than dead. This study aims to refine and test the feasibility of a new approach described by Robinson and Spencer (2006), and to explore the characteristics of the valuation data it generates. The approach introduces a 'lead time' into the TTO, producing a uniform procedure for generating values either >0 or <0. We used this lead time TTO to value 10 moderate to severe EQ-5D states using a sample of the general public (n=109). We conclude that the approach is feasible for use in valuation studies, and appears to overcome the discontinuity in values around 0 evident in conventional methods.

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Section: Discussionmentioning

confidence: 99%

A uniform time trade off method for states better and worse than dead: feasibility study of the ‘lead time’ approach

et al. 2011

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“…Robinson and colleagues 63 found that respondents in a TTO study may use a 'threshold of tolerability' to establish whether a state is severe enough for them to trade any time. In qualitative work, it has been found that respondents to a DCE study introduced additional information and assumptions to help them answer the questions.…”

Section: Influences On Responses To Health-state Valuation Tasksmentioning

confidence: 99%

Preparatory study for the revaluation of the EQ-5D tariff: methodology report

Mulhern

Bansback

Brazier

et al. 2014

Health Technology Assessment

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“…The patient is asked to score their current global quality of life as a number between 0 (completely dissatisfied) and 100 (completely satisfied). Despite its simplicity and ambiguous definition of quality of life, the Verbal Analogue-Scale provides a useful global assessment of current quality of life and can reveal finer quantitative differences than descriptive terms [25,26]. Norm sample results show means ranging 75.5±77.6 (standard deviation 15.1±18.2).…”

Section: Quality Of Life Measuresmentioning

confidence: 99%

Long-term treatment with continuous positive airway pressure improves quality of life in obstructive sleep apnoea syndrome

Sanner¹,

Klewer²,

Trumm³

et al. 2000

Eur Respir J

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Continuous positive airway pressure (CPAP) is an established treatment of obstructive sleep apnoea syndrome (OSAS). While it is known that CPAP reverses the pathological breathing pattern and improves daytime sleepiness, there are no sufficient data on the long‐term influence of CPAP on quality of life in patients with OSAS. Thirty‐nine patients with polysomnographically verified OSAS (apnoea/hypopnoea index (AHI): (mean±sd) 46.8±21.8 events·h‐1) were prospectively studied. All patients answered three quality of life measures (Complaint List, Nottingham Health Profile Part 1 (NHP), and Verbal Analogue‐Scale “quality of life”) prior to the initiation of CPAP therapy. After a mean of 9 months they were re‐evaluated by polysomnography, and completed the questionnaires once again. As expected, CPAP was effective in treating the sleep‐related breathing disorder. AHI decreased significantly from (mean±sd) 46.8±21.8 events·h‐1 to 3.3±6.3 events·h‐1, and minimum oxygen saturation increased from 77.1±9.3% to 89.9±3.4%, while body mass index did not change significantly (31.3±5.4 versus 30.8±4.8 kg·m‐2). During long‐term treatment with CPAP the Complaint List revealed a significant improvement of the extent of subjective impairment due to physical and general complaints (26.4±9.9 versus 20.4±11.1), and NHP a significant improvement of emotional reactions (19.8±21.7 versus 11.1±14.0) and energy (50.8±36.6 versus 32.1±36.7), but not of pain, physical mobility, sleep, social isolation, and quality of life as assessed by the Verbal Analogue‐Scale. It is concluded that long‐term continuous positive airway pressure therapy is effective in improving not only pathological breathing patterns but also parameters that estimate quality of life in patients with obstructive sleep apnoea syndrome.

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Valuing health status using VAS and TTO: What lies behind the numbers?

Cited by 140 publications

References 10 publications

A uniform time trade off method for states better and worse than dead: feasibility study of the ‘lead time’ approach

A uniform time trade off method for states better and worse than dead: feasibility study of the ‘lead time’ approach

Preparatory study for the revaluation of the EQ-5D tariff: methodology report

Long-term treatment with continuous positive airway pressure improves quality of life in obstructive sleep apnoea syndrome

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