Table 6 Predictors for impaired health-related quality of life measured by physical component summary (PCS) and mental component summary (MCS) of SF-36 and functional disability measured by HAQ-DI among systemic sclerosis patients

Age (in years)

− 0.149

− 0.127

0.282*

Sex (men = 1, women = 2)

− 0.164

− 0.117

0.246*

Sclerodactyly (no = 1, yes = 2)

− 0.013

–

–

Calcinosis (no = 1, yes = 2)

− 0.053

− 0.287*

0.038

Incomplete fist closure (no = 1, yes = 2)

− 0.080

–

0.324*

Raynaud’s Phenomenon (no = 1, yes = 2)

− 0.256*

–

–

Arthralgia/arthritis (no = 1, yes = 2)

− 0.195

–

0.068

Muscle weakness (no = 1, yes = 2)

− 0.120

–

0.165

Flexion contracture (no = 1, yes = 2)

− 0.257*

–

0.191