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]