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Table 4 Factor analysis of 20 MFI item responses.

From: Further validation of the Multidimensional Fatigue Inventory in a US adult population sample

 

Five Factors

 

1

2

3

4

5

General Fatigue

     

I feel fit

.83

    

I feel tired

   

.71

 

I feel rested

   

.52

 

I tired easily

   

.61

 

Physical Fatigue

     

Physically I feel I am in an excellent condition

.81

    

Physically I feel I am in a bad condition

.67

    

Physically I can take on a lot

.56

    

Physically I feel only able to do a little

.54

    

Reduced Activity (Vigor)

     

I think I do very little in a day

  

.84

  

I think I do a lot in a day

  

.78

  

I get little done

  

.72

  

I feel very active

.68

    

Reduced Motivation

     

I have a lot of plans

    

.89

I feel like doing all sorts of nice things

    

.53

I dread having to do things

   

.64

 

I don't feel like doing anything

   

.58

 

Mental Fatigue (Cognition)

     

When I am doing something, I can keep my thoughts on it

 

.81

   

I can concentrate well

 

.81

   

My thoughts easily wander

 

.75

   

It takes a lot of effort to concentrate on things

 

.71

   

Total % of Variance Explained

20.10

15.18

14.10

13.40

6.87

  1. Note: Factor loadings less than 0.5 were not listed in the table. The numbers in bold indicated the largest factor loading of the item loaded on different factor components.
  2. Kaiser-Meyer-Olkin (KMO) = 0.938, p-value for Bartlett's Test of Sphericity is < 0.001. Cumulative % of Variance Explained is 70%.
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Population Health Metrics

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