Deriving health state utilities for the numerical pain rating scale

Table 2 Crude means for different NPRS health states

Health state	N*	Minimum	Maximum	Mean	Std. Deviation	Deviation from full health	Deviation from nprs0
nprs0	73	0.875	0.975	0.973	0.012	0.027
nprs1	48	0.725	0.975	0.939	0.065	0.061	0.034
nprs2	100	0.475	0.975	0.931	0.085	0.069	0.043
nprs3	52	0.45	0.975	0.912	0.115	0.088	0.061
nprs4	52	0.325	0.975	0.852	0.153	0.148	0.121
nprs5	52	0.375	0.975	0.829	0.157	0.171	0.144
nprs6	48	0.275	0.975	0.721	0.217	0.279	0.252
nprs7	52	-0.379	0.975	0.569	0.319	0.431	0.404
nprs8	48	-0.379	0.975	0.398	0.349	0.602	0.575
nprs9	48	-1.667	0.975	0.202	0.449	0.798	0.771
nprs10	52	-0.379	0.975	0.180	0.327	0.820	0.793

* Pack A had 48 respondents, and pack B had 52 respondents. NPRS2 was in both packs. NPRS 0 was missing from both packs but added part way through the project to both packs.

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