. Author manuscript; available in PMC: 2017 Jul 1.

Published in final edited form as: Value Health. 2016 Apr 6;19(5):623–630. doi: 10.1016/j.jval.2016.02.009

Table 2.

Item level endorsement rates and discrimination (a) and difficulty (b) parameters of 5 items representing neuropathic pain quality

	a	SE	b₁	SE	b₂	SE	b₃	SE	b₄	SE	% endorsed^*
											CA	DN	OA	RA
In the past 7 days, did your pain feel ...
Numb	1.98	0.14	0.27	0.06	0.30	0.06	0.95	0.07	1.73	0.11	91.79	76.54	44.23	36.54
Tingly	3.09	0.23	0.37	0.06	0.24	0.05	0.83	0.06	1.58	0.08	86.57	80.11	51.89	45.51
Like pins and needles	4.05	0.37	0.31	0.05	0.19	0.05	0.70	0.05	1.22	0.06	79.10	83.98	49.06	43.77
Stinging	2.13	0.16	0.09	0.06	0.63	0.06	1.28	0.08	1.97	0.12	62.69	65.00	38.10	33.12
Electrical	2.02	0.17	0.48	0.06	0.95	0.07	1.48	0.09	2.09	0.13	49.25	54.70	29.25	20.70

endorsed defined as response indicating “a little bit”, “somewhat”, “quite a bit”, or “very much” as opposed to “not at all”.