Mean IgG4 serum levels in different diseases
| Diagnosis | Mean serum IgG4 level (mg/dL)±SD |
|---|---|
| Definite IgG4-RD (n=27) | 670±581 |
| Probable IgG4-RD (n=38) | 217±76 |
| Chronic sinusitis (n=46) | 196±55 |
| Recurrent pneumonia (n=29) | 243±101 |
| Immunodeficiency (n=10) | 234±105 |
| Connective tissue disease (n=11) | 258±128 |
| Pancreato-biliary disease (n=9) | 193±57 |
| Interstitial lung disease (n=5) | 218±51 |
| Infectious disease (n=4) | 271±67 |
| Aortitis (n=3) | 239±94 |
| Leukemia (n=2) | 951±324 |
| Miscellaneous (n=6) | 237±80 |