Deriving health state utilities for the numerical pain rating scale

Table 3 Decrements from full health adjusted for correlations and respondent characteristics

Independent variables	Coefficient (decrements from full health)	95% confidence interval of coefficient
nprs0	0.030	(-0.180 - 0.240)
nprs1	0.066	(-0.140 - 0.272)
nprs2	0.073	(-0.133 - 0.279)
nprs3	0.090	(-0.123 - 0.304)
nprs4	0.150	(-0.065 - 0.365)
nprs5	0.174	(-0.042 - 0.389)
nprs6	0.283	(0.077 - 0.490)**
nprs7	0.434	(0.207 - 0.660)**
nprs8	0.607	(0.397 - 0.817)**
nprs9	0.803	(0.598 - 1.008)**
nprs10	0.822	(0.602 - 1.043)**
Own nprs level	-0.013	(-0.028 - 0.002)
gender	0.023	(-0.048 - 0.094)
age	-0.001	(-0.002 - 0.001)
ed2-4 ⁺	-
job2-7 ⁺⁺	-	*
Self-assessed difficulty	-0.022	(-0.056 - 0.011)
Length of interview	0.005	(0.002 - 0.007)**

Key
* significant at 5%
** significant at 1%
⁺ four education levels were possible. These have been presented as a single variable with the significance tested on all coefficients being zero.
⁺⁺ seven job types were possible. These have been presented as a single variable with the significance tested on all coefficients being zero.

ISSN: 1477-7525