Table 3. Overall standard deviations based on model from NHMS and formula (2).

Index	N NHMS	Mean (SD) of index NHMS*	% at ceiling*	Unadjusted SEM-S*	Reliability of theta excluding instrument	Adjusted SEM-S*†	Reliability*
SF-6D	3739	0.79 (0.13)	4.2%	0.084	0.84	0.071	0.71
QWB	3758	0.66 (0.16)	3.2%	0.107	0.83	0.094	0.64
EQ-5D	3812	0.87 (0.15)	43%	0.099	0.83	0.084	0.70
HUI2	3558	0.85 (0.16)	14%	0.101	0.79 ‡	0.074	0.80
HUI3	3567	0.81 (0.24)	14%	0.152	0.79 ‡	0.117	0.77

^*Estimates are weighted to non-institutionalized population age 35-89 in the 48 contiguous states of the US.

^†Adjusted to account for measurement error in the theta used in regressions corresponding to each index.

^‡Excluding both HUI2 and HUI3