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Table 4 Correlations between SPADI subscales and SIP subscales

From: The Shoulder Pain and Disability Index demonstrates factor, construct and longitudinal validity

SPADI score Communication Eating Alertness Behaviour Mobility Emotional Behaviour Ambulation Sleep & Rest Body Care and Movement Social Interaction Psychosocial dimension Recreation and Pastime Home Management Work Physical dimension SIP Total
  Divergent→→→→→→→→→→→→→→→→→→→→→→→→→→Intermediate→→→→→→→→→→→→→→→→→→→→→→→→→→→→→→→→→Convergent
Baseline                
Pain 0.21* 0.22* 0.29** 0.33** 0.34** 0.32** 0.32** 0.42** 0.40** 0.37** 0.36** 0.54** -0.14 0.43** 0.43**
Disability 0.12 0.22* 0.28** 0.29** 0.30** 0.43** 0.31** 0.58** 0.31** 0.31** 0.36** 0.59** -0.04 0.55** 0.43**
Total 0.17 0.23** 0.30** 0.32** 0.33** 0.40** 0.33** 0.53** 0.37** 0.36** 0.38** 0.59** -0.10 0.51** 0.45**
3-months                
Pain 0.25** 0.23* 0.33 0.18 0.00 0.31** 0.45** 0.45** 0.46** 0.12 0.36** 0.63 0.16 0.42** 0.19
Disability 0.27** 0.35** 0.37** 0.30** 0.10 0.40** 0.37** 0.62** 0.47** 0.22* 0.35** 0.64** 0.22* 0.58** 0.30**
Total 0.27** 0.31** 0.37** 0.25** 0.05 0.37** 0.44** 0.56** 0.49** 0.18 0.37** 0.67** 0.20* 0.53** 0.26**
6-months                
Pain 0.30** 0.08 0.31** 0.14 0.35** 0.28** 0.40** 0.24* 0.30** 0.35** 0.42** 0.50** 0.22* 0.25* 0.34**
Disability 0.35** 0.15 0.48** 0.20* 0.40** 0.35** 0.46** 0.39** 0.45** 0.50** 0.46** 0.51** 0.31** 0.37** 0.49**
Total 0.34** 0.12 0.41** 0.18 0.40** 0.33** 0.46** 0.33** 0.39** 0.44** 0.46** 0.53** 0.27** 0.33** 0.43**
  1. ** Correlation is significant at the 0.01 level (2-tailed). * Correlation is significant at the 0.05 level (2-tailed). Columns are order according to hypothesized convergence of constructs with SPADI, i.e., divergent subscales are to the left, the equivocal ones in the middle and convergent construct subscales are on the right. According to Cohen (1987) the effect sizes for correlation coefficients are r ≈ 0.10 is small effect with negligible practical importance, r ≈ 0.30 is a medium effect with moderate practical importance and r ≈ 0.50 is a large effect of crucial practical importance.[22]