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Table 1 Communalities and factor loadings for individual items

From: Factor structure of the Shoulder Pain and Disability Index in patients with adhesive capsulitis

Items

Communalities

Factor 1

Factor 2

 

(both factors)

loading

loading

   Pain section:

   

PS.1 At its worst?

0.50

0.67

0.23

PS.2 When lying on the involved side?

0.57

0.66

0.36

PS.3 Reaching for something on a high shelf?

0.66

0.80

0.16

PS.4 Touching the back of your neck?

0.41

0.44

0.46

PS.5 Pushing with the involved arm?

0.48

0.44

0.54

   Disability section:

   

DS.1 Washing your hair?

0.64

0.56

0.58

DS.2 Washing your back?

0.61

0.76

0.19

DS.3 Putting on an undershirt or pullover sweater?

0.50

0.41

0.58

DS.4 Putting on a shirt that buttons down the front?

0.71

-0.04

0.84

DS.5 Putting on your pants?

0.71

0.27

0.80

DS.6 Placing an object on a high shelf?

0.68

0.81

0.15

DS.7 Carrying a heavy object of 10 pounds?

0.47

0.49

0.48

DS.8 Removing something from your back pocket?

0.47

0.57

0.38

  1. Items considered to load on a factor are bolded.