Linguistic and psychometric validation of the MSSS-88 questionnaire for patients with multiple sclerosis and spasticity in Germany

Table 3 Convergent and discriminant construct validity [at inclusion (n = 87)]

MSSS-88 Subscale	Convergent Validity			Discriminant Validity
MSSS-88 Subscale	Instrument	Subscale	Spearman correlation coefficient	Instrument	Subscale	Spearman correlation coefficient
Muscle Stiffness	EQ-5D	Mobility	0.40	WEIMuS	Cognitive fatigue	0.28
Muscle Stiffness	MSQoL-54	Physical health	0.56
Pain and Discomfort	EQ-5D	Pain/discomfort	0.58	WEIMuS	Cognitive fatigue	0.44
Pain and Discomfort	MSQoL-54	Pain	0.71
Muscle Spasms	EQ-5D	Mobility	0.49	WEIMuS	Cognitive fatigue	0.26
Muscle Spasms	MSQoL-54	Physical health	0.52
Activities of Daily Living	EQ-5D	Usual activity	0.68	WEIMuS	Cognitive fatigue	0.25
Activities of Daily Living	MSQoL-54	Physical health	0.71
Walking	EQ-5D	Mobility	0.44	WEIMuS	Physical fatigue	0.34
Walking	MSQoL-54	Physical health	0.68
Body Movements	EQ-5D	Mobility	0.59	WEIMuS	Cognitive fatigue	0.26
Body Movements	MSQoL-54	Physical health	0.67
Emotional Health	EQ-5D	Anxiety/depression	0.65
	MSQoL-54	Emotional well-being	0.69
	MSQoL-54	Health distress	0.73
Social Functioning	WEIMuS	Cognitive Fatigue	0.58
Social Functioning	MSQoL-54	Social function	0.61

Spearman correlation between MSSS-88 subscales and corresponding subscales of other patient-reported instruments.

ISSN: 1477-7525