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Table 5 Factor loading distribution (extraction method: principal component analysis with varimax rotation)

From: Thai version of the foot function index: a cross-cultural adaptation with reliability and validity evaluation

  Items Factor loadinga
1 2 3 4
Pain 1. Worst foot pain 0.779 − 0.244 − 0.181 − 0.022
2. Morning foot pain 0.790 − 0.146 0.006 0.103
3. Pain walking barefoot 0.909 − 0.133 0.075 − 0.074
4. Pain standing barefoot 0.894 − 0.119 0.107 − 0.006
5. Pain walking with shoes 0.868 − 0.033 0.008 0.050
6. Pain standing with shoes 0.857 − 0.042 0.057 0.015
7. Pain walking with orthotics 0.547 0.485 − 0.384 0.550
8. Pain standing with orthotics 0.577 0.495 − 0.388 0.508
9. Foot pain at end of day 0.765 − 0.049 − 0.246 0.001
Disability 10. Walking in house 0.915 0.080 0.066 − 0.108
11. Walking outside 0.936 − 0.095 0.023 − 0.156
12. Walking four blocks 0.870 − 0.104 − 0.152 − 0.203
13. Climbing stairs 0.840 − 0.150 − 0.108 − 0.102
14. Descending stairs 0.900 − 0.107 − 0.028 0.017
15. Standing on tiptoe 0.860 − 0.007 − 0.081 − 0.176
16. Getting up from chair 0.909 − 0.128 0.028 − 0.060
17. Climbing curbs 0.913 − 0.087 − 0.112 − 0.035
18. Running or walking fast 0.901 − 0.083 − 0.109 0.029
Activity limitation 19. Using device indoors 0.513 − 0.048 0.642 0.311
20. Using device outdoors 0.442 0.322 0.658 0.291
21. Staying inside all day 0.631 − 0.060 0.422 0.098
22. Staying in bed all day 0.372 0.827 0.056 − 0.369
23. Limiting activities 0.370 0.812 0.114 − 0.412
  1. aThe bold numbers show strong loading to a single factor