Table 3: Laboratory difference between IgG4-TIN patients with glomerular lesions and those without glomerular lesions.

IgG4-TIN with GLIgG4-TIN without GLP value

Number of patients 9 11
Age (years), mean ± SD 0.036
Serum creatinine (mg/dL) 0.239
Serum IgG (mg/dL) 0.16
Serum IgG4 (mg/dL) 0.909
SerumC3  (mg/dL)
Low C4 0.197
Low CH50 0.197
IgG4 IHC (cells per hpf) 0.493
IgG4/IgG (%) 0.518
IF TBM IgG >0.999
IF TBM C3 0.615
IF TBM C1q >0.999
EM TBM >0.999

Note: Conversion factor for creatinine: mg/dL to μmol/L, 88.4.
Abbreviations: EM: electron microscopy; GL: glomerular lesions; hpf: high-power field; IF: immunofluorescence; IHC: immunohistochemistry; TBM: tubular basement membranes; TIN: tubulointerstitial nephritis.