Feature | Number | Mean PGRN (95% confidence interval) | P | |
---|---|---|---|---|
 |  | Positive a | Negative a |  |
Serologic featureb | Positive/negative | Â | Â | Â |
   Anti-Sm | 25/17 | 111.8 (93.4-130.1) | 94.1 (56.5-131.7) | 0.381c |
   Anti-nRNP | 23/12 | 128.9 (102.7-155.0) | 74.9 (53.5-96.3) | 0.002c |
   Anti-Ro | 26/13 | 102.7 (79.6-125.8) | 105.6 (67.6-143.6) | 0.888 |
   Anti-CL | 20/24 | 112.4 (84.0-140.8) | 87.4 (65.2-109.6) | 0.150 |
Clinical featuresd | Â | Â | Â | Â |
   0 | 22 | 51.3 (34.5-68.1) | <0.001ef | |
   1-2 | 31 | 91.8 (81.1-102.5) | <0.001e | |
   3-8 | 15 | 132.3 (113.1-151.5) | 0.005g |