RO60 and systemic sclerosis: While there was a similar percentage of black SSc/SRC cases and black SSc/no SRC controls with elevated prediagnostic Ro60 autoantibody [50% (5/10) vs. 39% (7/18), p = 0.69], more black cases with SSc/SRC cases had a Ro60 autoantibody levels greater than 10 times normal, [50% (5/10) vs. 6% (1/18), p = 0.01].