Table 5.

Phase 3: Assessment of Construct Validity: Correlations between S-VLA Scores and Other Measures

	Correlation of S-VLA with:
	HAQ	RADAI	SAWS Total	SAWS Abilities	APaQ	SF-36 PCS	SF-36 Physical Functioning	SF-36 Role Physical	SF-36 Social Functioning
Total sample	0.81	0.71	0.81	0.82	0.65	−0.78	−0.80	−0.67	−0.72
By sex
Women (n = 111)	0.81	0.67	0.89	0.82	0.65	−0.77	−0.79	−0.68	−0.74
Men (n = 39)	0.78	0.82	0.83	0.82	0.65	−0.78	−0.82	−0.60	−0.71
By RA duration
<25 months (n = 18)	0.81	0.69	0.82	0.84	0.84	−0.89	−0.94	−0.67	−0.81
≥ 25 months (n = 132)	0.81	0.72	0.81	0.82	0.65	−0.76	−0.78	−0.68	−0.75

RADAI = Rheumatoid Arthritis Disease Activity Index; HAQ = Health Assessment Questionnaire; SAWS = Satisfaction with Abilities and Well-being Scale; APaQ = Activity Participation Questionnaire; SF-36 = Short-Form-36 Health Survey

Note: For the S-VLA, HAQ, RADAI, SAWS, and APaQ, higher scores reflect worse functioning. For the SF-36 scales, higher scores reflect better functioning