Development of a patient reported outcome measure for fatigue in motor neurone disease: the Neurological Fatigue Index (NFI-MND)

Table 3 Summary Analysis figures for Rasch analyses of the NFI:MND

		Item Residual		Person Residual		Chi Square		PSI	Unidimensional t-test (CI%)	% extreme scores
Analysis Name	# of items	Mean	± SD	Mean	± SD	Value	p
1. Energy Initial	15	-0.34	2.21	-0.46	1.61	91.94	< 0.0001	0.93	9.34% (7-12)	0.80%
2. Energy Final	6	0.25	1.08	0.46	1.13	12.63	0.81	0.88	3.86%	4.40%
3. Weakness Initial	9	0.41	2.74	0.27	1.30	106.5	< 0.0001	0.86	2.79%	3.70%
4. Weakness Final	7	-0.08	1.36	-0.41	1.15	29.24	0.11	0.86	4.24%	5.10%
5. Summary Initial	13	-0.72	1.56	-0.42	1.38	70.22	0.04	0.92	4.44%	1.70%
6. Summary Final	8	0.11	1.25	-0.4	1.20	32.93	0.42	0.86	5.15% (3-8)	2.40%
*Ideal Values*		0	*< 1.4*	0	*< 1.4*		*> 0.05* ^a	*> 0.85*	*< 5% (CI < 0.05)*

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