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Table 3 Summary Fit Statistics for Rasch analyses

From: Validation of the Neurological Fatigue Index for stroke (NFI-Stroke)

Analysis Number Analysis Name Item Residual Person Residual Chi-Square PSI Unidimensional
t-test
(CI)
   Mean SD Mean SD Value p   
1 Physical (8 items) -0.379 1.011 -0.547 1.415 21.4 0.922 0.89 5.98%
(3.2-8.8)
2 Cognitive (4 items) -0.043 1.977 -0.597 1.224 18.9 0.092 0.78 3.29%
(0.4-6.2)
3 Summary (10 items) -0.357 1.156 -0.622 1.551 52.8 0.085 0.89 5.0%
(2.2-7.8)
4 Diurnal – Initial (6 items) -0.423 1.862 -0.683 1.351 50.5 0.001 0.70 7.72%
(5.1-10.4)
5 Diurnal – Final (5 items) -0.842 1.783 -0.648 1.174 18.9 0.219 0.69 5.56%
(2.8-8.3)
6 Nocturnal Sleep (5 items) 0.229 1.451 -0.563 1.501 31.5 0.008 0.69 4.22%
(1.4-7.0)
  Acceptable Values 0 <1.4 0 <1.4   >0.05 a >0.85 < 5.0% (Lower CI)
  1. a Bonferroni adjusted alpha level.