Lead time TTO: leading to better health state valuations?
Health Econ
; 22(4): 376-92, 2013 Apr.
Article
en En
| MEDLINE
| ID: mdl-22396243
ABSTRACT
Preference elicitation tasks for better than dead (BTD) and worse than dead (WTD) health states vary in the conventional time trade-off (TTO) procedure, casting doubt on uniformity of scale. 'Lead time TTO' (LT-TTO) was recently introduced to overcome the problem. We tested different specifications of LT-TTO in comparison with TTO in a within-subject design. We elicited preferences for six health states and employed an intertemporal ranking task as a benchmark to test the validity of the two methods. We also tested constant proportional trade-offs (CPTO), while correcting for discounting, and the effect of extending the lead time if a health state is considered substantially WTD. LT-TTO produced lower values for BTD states and higher values for WTD states. The validity of CPTO varied across tasks, but it was higher for LT-TTO than for TTO. Results indicate that the ratio of lead time to disease time has a greater impact on results than the total duration of the time frame. The intertemporal ranking task could not discriminate between TTO and LT-TTO.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Estado de Salud
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Años de Vida Ajustados por Calidad de Vida
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Economía Médica
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Prioridad del Paciente
Tipo de estudio:
Health_economic_evaluation
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Prognostic_studies
Límite:
Adult
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Female
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Humans
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Male
Idioma:
En
Año:
2013
Tipo del documento:
Article