Clinical and demographic characteristics of the Swedish sample sets in this study.

1Ro/SSA positive patients without signs of systemic inflammation = 21, DLE = 2, SCLE = 8, SLE = 31, SS = 23, UCTD = 6 from the study of Popovic et al. [19].2SS patients, data provided by Prof. Marie Wahren-Herlenius, MD, PhD, Dept. of Medicine, Rheumatology Unit, Karolinska Institutet, Solna, Sweden.3Mean age at initial testing for Ro/SSA-autoantibodies [19].Na = data not available.Percentage (%) of patients is shown except for mean age, which is shown in years (yrs).