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

Table 5 Correlations between changes in health and coping strategies with SPADI

CHANGE SCORES	SPADI PAIN	SPADI DISABILITY	SPADI TOTAL
SPADI Pain		0.66**	0.91**
SPADI Disability	0.66**		0.88**
SPADI Total	0.91**	0.88**
SIP Home Maintenance	0.10	0.27**	0.20*
SIP Physical Summary	-0.06	0.18	0.06
CSQ Diverting attention	-0.15	-0.15	-0.16
CSQ Reinterpreting Pain Sensations	-0.07	-0.12	-0.09
CSQ Coping Self Statements	0.12	0.16	0.16
CSQ Ignoring Sensations	0.05	-0.03	0.01
CSQ Praying/Hoping	-0.06	-0.02	-0.04
CSQ Catastophizing	0.20*	0.25*	0.25*
CSQ Increase Behavioural Act	0.05	-0.03	0.01

** Correlation is significant at the 0.01 level (2-tailed). * Correlation is significant at the 0.05 level (2-tailed). These correlations suggest that the relationship between changes in overall physical health on the SIP or coping strategies are poorly correlated. Changes in pain catastrophizing were significantly correlated. 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]

ISSN: 1471-2474