Example for interpretation of results: the presence of anti-RNA polymerase III is associated with (A) a higher mRSS by 4.5 units at baseline and (B) losing an extra 2.1 units per year compared with an average of −3.0 units per year for all patients.

*Renal involvement is defined as renal crisis and/or moderate-to-severe renal impairment.

p⁽¹⁾: Significance p value for characteristic coefficient in linear regression of baseline mRSS on baseline predictor.

p⁽²⁾: Significance p value for interaction coefficient between time and baseline characteristic in a longitudinal regression model.

CRP, C reactive protein; DLCO, carbon monoxide diffusing capacity; ESR, erythrocyte sedimentation rate; FACIT, Functional Assessment of Chronic Illness Therapy; FVC, forced vital capacity; GI, gastrointestinal; HAQ-DI, Health Assessment Questionnaire Disability Index; mRSS, modified Rodnan skin score (17 sites); SF36, Short-Form 36.