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Table 3 Exploratory factor analysis

From: Measurement properties of the Western Ontario Shoulder Instability Index in Dutch patients with shoulder instability

  3-factor 2-factor 1-factor
Question Factor 1 Factor 2 Factor 3 Factor 1 Factor 2 Factor 1
1 ,302 ,402 ,662 ,743 ,357 ,779
2 ,145 ,375 ,761 ,830 ,192 ,725
3 ,396 ,604 ,417 ,625 ,531 ,818
4 ,339 ,546 ,523 ,693 ,449 ,809
5 ,125 ,653 ,296 ,571 ,300 ,617
6 ,152 ,560 ,470 ,671 ,281 ,675
7 ,028 ,375 ,706 ,793 ,086 ,624
8 ,407 ,665 ,230 ,494 ,577 ,757
9 ,323 ,704 ,297 ,579 ,504 ,766
10 ,374 ,648 ,332 ,576 ,531 ,783
11 ,659 ,451 ,299 ,423 ,740 ,822
12 ,608 ,469 ,396 ,520 ,690 ,855
13 ,694 ,533 ,075 ,269 ,819 ,767
14 ,375 ,147 ,738 ,674 ,338 ,717
15 ,582 ,378 ,185 ,295 ,654 ,670
16 ,535 ,020 ,578 ,458 ,463 ,652
17 ,624 ,402 ,156 ,279 ,704 ,693
18 ,204 ,277 ,732 ,749 ,219 ,686
19 ,753 ,327 ,113 ,192 ,805 ,703
20 ,792 ,051 ,173 ,102 ,749 ,600
21 ,738 ,155 ,364 ,323 ,715 ,733
Scores       
0.50 9 8 7 12 12 21
  1. Factor loadings ≥0.50 are appropriate (bold). Best results are with the 1-factor model in which all questions score at least 0.50.