. Author manuscript; available in PMC: 2013 Oct 29.

Published in final edited form as: Value Health. 2011 Jul-Aug;14(5):10.1016/j.jval.2011.01.004. doi: 10.1016/j.jval.2011.01.004

Table 3.

Goodness of fit for the Rasch model for each dimension

	Item-trait interaction

Dimension	Chi-sq (degrees of freedom)	P-value	Item fit (SD)	Person fit (SD)	Person separation index
Physical and role functioning and pain	121.36 (88)	0.01	−0.58(2.12)	−0.32(1.02)	0.90
Social functioning	10.82 (8)	0.21	0.85(0.42)	−0.44(0.80)	0.79
Emotional functioning	65.34 (54)	0.14	−0.18(2.14)	−0.35(0.96)	0.85
Digestion	72.08 (35)	0.00	−0.67(1.20)	−0.30(0.75)	0.47
Fatigue and trouble sleeping	22.05 (20)	0.34	0.08(1.16)	−0.65(1.27)	0.83