Journal of Patient-Reported Outcomes

Table 2 Construct Validity: Spearman Correlations of the PROMIS-PF and Worst Stiffness NRS item with Other Related Measures (Baseline)

From: Psychometric properties of a custom Patient-Reported Outcomes Measurement Information System (PROMIS) physical function short form and worst stiffness numeric rating scale in tenosynovial giant cell tumors

Measures	PROMIS-PF			Worst Stiffness
Measures	Missing N	N	Corr.	Missing N	N	Corr.
PROMIS-PF	–	–	–	6	114	−0.45***
Worse Stiffness NRS	6	114	−0.45***	–	–	–
BPI	6	114	−0.52***	6	114	0.83***
EQ-5D-5L
Mobility	19	101	−0.63***	20	100	0.37***
Self-care	19	101	−0.46***	20	100	0.30**
Usual activities	19	101	−0.67***	20	100	0.31**
Pain/discomfort	19	101	−0.48***	20	100	0.47***
Anxiety/depression	19	101	−0.23*	20	100	0.28**
Index Score	19	101	0.62***	20	100	−0.54***
VAS	19	101	0.47***	20	100	−0.21*
Tumor Volume Score	5	115	−0.06	18	112	0.08
Range of Motion measurement	4	116	0.35***	17	113	−0.31***

*p < 0.05; **p < 0.01; ***p < 0.001

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