Table 4

Correlations between SPADI subscales and SIP subscales

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**


** 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]

MacDermid et al. BMC Musculoskeletal Disorders 2006 7:12   doi:10.1186/1471-2474-7-12

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