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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.