Table 5 Results of the Factor Analysis of 54 Fatigue Questions from four Fatigue Questionnaires.

From: Fatigue Profiles in Patients with Multiple Sclerosis are Based on Severity of Fatigue and not on Dimensions of Fatigue

Total Variance Explained
FactorInitial EigenvaluesExtraction Sums of Squared LoadingsRotation Sums of Squared Loadingsa
Total% of VarianceCumulative %Total% of VarianceCumulative %Total
117.14431.74931.74916.74331.00631.0068.804
25.94611.01242.7605.56110.29741.30411.960
32.8725.31948.0792.4404.51945.8227.510
42.3994.44352.5231.9553.62049.4426.304
51.8883.49756.0191.4382.66452.1055.578
61.5872.93858.9581.1852.19554.3007.554
71.2942.39661.3540.8011.48455.7842.932
81.1712.16963.5230.7271.34757.1313.525
90.9621.78265.305    
10b0.9371.73667.041    
  1. aWhen factors are correlated, sums of squared loadings cannot be added to obtain a total variance.
  2. bTable has been shortened after 10 of 54 factors. Extraction Method: Principal Axis Factoring. Rotation Method: Oblimin with Kaiser Normalization.