Table 4 Hypotheses testing for Spearman’s rank correlations between the Italian version of the Shoulder Pain and Disability Index (SPADI) and comparator instruments (N = 124)
Hypothesis testing | Estimated Correlation | Hypothesis met? |
|---|---|---|
Pain subscale | ||
1.The correlation between the Pain subscale and the NPRS scores is > 0.60 | 0.65** | Yes |
2.The correlation between the Pain subscale and the DASH total scores is > 0.60 | 0.62** | Yes |
3.The correlation between the Pain subscale and the physical functioning (PF) subscale of the SF-36 scores is > 0.30 | -0.32** | Yes |
4.The correlation between the Pain subscale and the bodily pain (BP) subscale of the SF-36 scores is > 0.30 and < 0.60 | -0.37* | Yes |
Disability subscale | ||
1.The correlation between the Disability subscale and the DASH total scores is > 0.60 | 0.77** | Yes |
2.The correlation between the Disability subscale and the NPRS scores is between > 0.30 and < 0.60 | 0.49** | Yes |
3.The correlation between the Disability subscale and the role physical (RP) subscale of the SF-36 scores is > 0.30 | -0.40** | Yes |
4.The correlation between the Disability subscale and the social functioning (SF) subscale of the SF-36 scores is > 0.30 | -0.26** | No |