Top panel: Sera from 235 pSjS patients and 50 verified controls were tested for reactivity with in vitro transcribed, translated, and 35S-Met labeled TRIM38. Data are shown as antibody units based on a positive control pool from anti-TRIM38 positive lupus patients. The dotted line shows the cut-off for positivity, based on Mean+2SD of verified control sera. All samples above the cut-off were considered positive. Based on the reactivity with TRIM38, the pSjS population was split into 2 groups, anti-TRIM38+ (n=24) and anti-TRIM38− (n=211) and clinical measurements for dry eye (middle panel: vB score, Schirmer’s test scores) and dry mouth (bottom panel: minor labial salivary gland focus score and WUSF) were compared between these 2 groups. Statistical significance was determined by the Mann-Whitney test.