Reconsidering the use of rankings in the valuation of health states: a model for estimating cardinal values from ordinal data

Table 3 Test-retest reliability of rankings and time trade-off values

	Intraclass correlation coefficient*
Response type	Median	Mean	Standard deviation
Ordinal ranks	0.93	0.90	0.11
Time trade-off	0.79	0.74	0.19
Implied ranks from time trade-off	0.84	0.78	0.17

*Intraclass correlation coefficients between test and retest responses were computed at the individual level for 211 respondents.

ISSN: 1478-7954