Factor structure of the Oxford Shoulder Score: secondary analyses of the UK FROST and PROFHER trial populations

Table 3 UK FROST CFA results

UK FROST OSS factor model	X²	df	Normed X²	CFI	GFI	SRMSR	RMSEA	RMSEA 90% CIs
Model 1 (1 factor) All 12 items	272.83	54	5.05	0.935	0.986	0.0683	0.137	(0.127; 0.148)
Model 2 (2 factors) Pain = items 1,8,12 Function = all other items	214.40	53	4.05	0.952	0.990	0.0540	0.121	(0.111; 0.132)
Model 3 (2 factors) Pain = items 1,8,12,11 Function = all other items	233.33	53	4.40	0.946	0.989	0.0581	0.129	(0.118; 0.140)

Unsatisfactory results based on standard cut-offs in bold text
CFI Comparative fit index, GFI Goodness-of-fit index, SRMSR Standardised root mean square residual, RMSEA Root mean square error of approximation

ISSN: 1749-799X