. Author manuscript; available in PMC: 2015 Dec 1.

Published in final edited form as: Health Serv Outcomes Res Methodol. 2014 Sep 6;14(4):213–231. doi: 10.1007/s10742-014-0125-x

Table 6.

Prediction of EQ-5D Total Scores from Estimated Item Responses

(1) Observed and Expected Total Score (Summed for Items 1-5)
Primary factor from:	Observed Total score (0) (N=12950)		Expected Total Score (E) (N=12950)		O-E (N=12950)		Correlation of O & E (SE)
	Av	SD	Av	SD	Av	SD
Items 6-17	6.215	1.564	5.905	1.479	0.309	0.947	0.808 (<0.0001)
Items 6-17 (^*)	6.215	1.564	5.965	1.425	0.249	0.882	0.830 (<0.0001)
Items 1-5	6.215	1.564	5.786	1.440	0.428	0.573	0.931 (<0.0001)
Items 1-17	6.215	1.564	5.917	1.476	0.298	0.809	0.860 (<0.0001)

100 of primary thetas drawn from N (mean of est. theta_i, var of est.

theta_i) for each i are used to calculate probability