Table 3 Assessment of discriminant validity by correlation between number of organs involved with HAQ-DI, SHAQ VAS and SHAQ global scores (n = 56)

HAQ-DI

0.636^a

0.0001

 • Dressing and grooming

0.423^a

0.001

 • Arising

0.593^a

0.0001

 • Eating

0.415^a

0.001

 • Walking

0.477^a

0.0001

 • Hygiene

0.496^a

0.0001

 • Reach

0.569^a

0.0001

 • Grip

0.499^a

0.0001

 • Activities

0.118

0.385

SHAQ VAS

0.587^a

0.0001

 • Pain VAS

0.701^a

0.0001

 • Digestive VAS

0.596^a

0.0001

 • Pulmonary VAS

0.247

0.067

 • Raynaud’s VAS

0.195

0.149

 • Digital ulcer VAS

0.096

0.483

SHAQ global

0.721^a

0.0001