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Table 1 Positive outcome of PNC assay and CLIFT in MRG patients

From: The assessment of serum-mediated phagocytosis of necrotic material by polymorphonuclear leukocytes to diagnose and predict the clinical features of systemic lupus erythematosus: an observational longitudinal study

Diagnosis PNC+ (%) CLIFT+ (%) PNC+CLIFT+ (%) Total (%)
Arthralgia [%] 2 (5.7) [5.9] 0 0 34 (6.4) [100]
Connective tissue disease [%] 3 (8.6) [5.6] 7 (15.9) [13] 2 (13.3) [3.7] 54 (10.2) [100]
Dermatological disorder [%] 0 0 0 17 (3.2) [100]
Inflammatory joint disease [%] 3 (8.6) [2.7] 8 (18.2) [7.1] 2 (13.3) [1.8] 112 (21.2) [100]
Osteoarthritis [%] 6 (17.1) [10.2] 0 0 59 (11.2) [100]
Non-rheumatic disease [%] 6 (17.1) [5] 6 (13.6) [5] 1 (6.7) [0.8] 120 (22.7) [100]
Soft tissue rheumatism [%] 1 (2.9) [4] 0 0 25 (4.7) [100]
Systemic inflammatory disease [%] 1 (2.9) [4.2] 2 (4.5) [8.3] 0 24 (4.5) [100]
Unspecified [%] 0 0 0 19 (3.6) [100]
SLE [%] 13 (37.1) [20] 21 (47.7) [32.3] 10 (66.7) [15.4] 65 (12.3) [100]
Total 35 (100) 44 (100) 15 (100) 529 (100)
  1. CLIFT Crithidia luciliae immunofluorescence test, PNC phagocytosis of necrotic cell material, SLE systemic lupus erythematosus
  2. The different subsets of patients are grouped on the basis of final diagnosis recorded after a median of 4.7 years, as described elsewhere [32]. The percentage of positive laboratory tests is reported in round brackets; the percentage of positive patients in the different subsets is reported in square brackets