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Table 4 Test-retest comparison for NFI:MND

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

Scale

T1-T2 Correlations

Mean Scores T1, T2

SD (q1-q3)

Mean difference

% of cases falling within 95% confidence interval

Summary

0.84*

14,14a

9.79 (7-13)

0.10

94.03%

Energy

0.67**

10,10b

13.09 (11-16)

0.15

89.66%

Weakness

0.86*

13,13a

17.42 (14-21)

0.10

92.54%

  1. * Pearson's r
  2. **Spearman's Rho
  3. a Paired Samples T-Test; p > 0.0001
  4. b Wilcoxon Signed Rank; p > 0.0001. Note median score used due to sample distribution
  5. Key - SD = Standard deviation, q1 = Quartile One, q3 = Quartile Three