Patients with isolated anti-Ro52 had a wider variety of diseases associated, but among auto-immune diseases they were more prone to inflammatory myositis (OR 10.5 [1.4-81.7], <i>p</i> = 0.02) and inflammatory rheumatism (OR 4.6 [1.6-13.8], <i>p</i> = 0.006) in contrast to systemic lupus (OR 0.2 [0.1-0.3], <i>p</i> < 10<sup>-4</sup>) or primary Sjögren's syndrome (OR 0.1 [0.06-0.2], <i>p</i> < 10<sup>-4</sup>).