Cutoff Values of Serum IgG4 and Histopathological IgG4+ Plasma Cells for Diagnosis of Patients with IgG4-Related Disease

Table 3

Sensitivity and specificity of serum cutoff values in the diagnosis of IgG4-RD.

	Sensitivity	Specificity
IgG4 > 135 mg/dL	97.0%	79.6%
IgG4/IgG > 5%	99.2%	83.3%
IgG4/IgG > 6%	97.0%	83.3%
IgG4/IgG > 7%	97.0%	85.4%
IgG4/IgG > 8%	95.5%	87.5%
IgG4/IgG > 9%	92.4%	89.6%
IgG4/IgG > 10%	89.4%	91.7%