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Table 2 Explanatory factor analysis with promax-rotated factor loadings of the Constant-Murley Score items

From: Chinese version of the Constant-Murley questionnaire for shoulder pain and disability: a reliability and validation study

Constant-Murley score item Score of each item Principal Component Coefficients ≥0.4
Factor 1 Factor 2
Pain 5.24 ± 2.86 0.569  
Activities of daily living 11.32 ± 6.00
 Work 1.84 ± 1.12   0.766
 Recreation/sport 1.67 ± 1.12   0.794
 Sleep 0.88 ± 0.67   0.498
 Positioning 6.14 ± 3.72   0.645
Range of motion 20.22 ± 8.20
 Forward elevation 5.96 ± 2.52 0.766
 Lateral elevation 5.82 ± 2.21 0.848
 External rotation 3.67 ± 2.84 0.407
 Internal rotation 4.99 ± 2.32 0.753
Power 22.57 ± 1.13 0.649