Measuring Duchenne muscular dystrophy impact: development of a proxy-reported measure derived from PROMIS item banks

Table 4 Model fit statistics of PROMIS parent proxy domains

Domain	No. items	RMSEA	90% CI, LL	90% CI, UL	CFI	TLI	Marginal reliability
Fatigue impact	5	0.095	0.061	0.133	0.998	0.997	0.92
Strength impact	4	0.070	0.022	0.131	0.999	0.997	0.87
Negative affect^†	9	0.070	0.053	0.089	0.994	0.989	0.88
Sleep-device symptoms*	4	0.140	0.089	0.198	0.971	0.914	0.75
Cognitive function	9	0.070	0.022	0.131	0.999	0.997	0.89
Upper extremity function	5	0.110	0.078	0.145	0.999	0.997	0.91
Positive affect	4	0.078	0.028	0.135	0.999	0.997	0.87
Mobility*	13	0.145	0.133	0.158	0.987	0.983	0.93

ISSN: 1750-1172