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Table 3 Laboratory findings

From: New clues to the nature of immunoglobulin G4-related disease: a retrospective Japanese multicenter study of baseline clinical features of 334 cases

Test item Value
IgG (mg/dl) 2403 ± 1204
IgG4 (mg/dl) 755 ± 642
Elevation of IgG4 (≥135) 318/333 (95.5%)
IgE (IU/ml) 611 ± 1198
Elevation of IgE (≥250) 158/309 (51.1)
CRP (mg/dl) 0.42 ± 0.94
CRP (mg/dl), median 0.10
CRP < 0.5 mg/dl 262/328 (79.9)
CRP < 1.0 mg/dl, 296/328 (90.2)
Elevation of CRP (≥0.3) 90/328 (27.4)
C3 (mg/dl) 94.6 ± 31.5
C3 < 86 103/297 (34.7)
C4 (mg/dl) 21.2 ± 23
C4 < 17 100/297 (33.7)
CH50 (U/ml) 41.1 ± 15.5
CH50 < 25 46/292 (15.8)
  1. Data presented as mean ± standard deviation or number/total (%), unless indicated otherwise
  2. CRP C-reactive protein, IgE immunoglobulin E, IgG4 immunoglobulin G4