Immunoglobulin G
Immunglobulin G (IgG) binds to antigens and triggers antigen catabolism. Low levels occur in immunodeficiency syndromes, whereas high levels are observed in severe infections and autoimmune diseases.
Reference Ranges
| Adults | ||
|---|---|---|
| 700 – 1600 mg/dL | 46.9 – 107 µmol/L | |
| Children | ||
|---|---|---|
| Newborns | 660 – 1750 mg/dL | 44.2 – 117 µmol/L |
| 1 month | 390 – 1050 mg/dL | 26.1 – 70.4 µmol/L |
| 2 months | 250 – 680 mg/dL | 16.8 – 46.6 µmol/L |
| 3 months | 200 – 550 mg/dL | 13.4 - 36.9 µmol/L |
| 4 months | 200 – 540 mg/dL | 13.4 – 36.2 µmol/L |
| 5 months | 220 – 600 mg/dL | 14.7 – 40.2 µmol/L |
| 6 months | 260 – 490 mg/dL | 17.4 – 32.8 µmol/L |
| 7 months | 290 – 770 mg/dL | 19.4 – 51.6 µmol/L |
| 8 months | 320 – 840 mg/dL | 21.4 – 56.3 µmol/L |
| 9 months | 330 – 880 mg/dL | 22.1 – 59.0 µmol/L |
| 10 months | 350 – 910 mg/dL | 23.5 - 61.0 µmol/L |
| 11 months | 350 – 930 mg/dL | 23.5 – 62.3 µmol/L |
| 12 months | 360 – 950 mg/dL | 24.1 – 63.7 µmol/L |
| 2 years | 470 – 1230 mg/dL | 31.5 – 82.4 µmol/L |
| 4 years | 540 – 1340 mg/dL | 36.2 – 89.8 µmol/L |
| 6 years | 590 – 1430 mg/dL | 39.5 – 95.8 µmol/L |
| 8 years | 630 – 1500 mg/dL | 42.2 – 101 µmol/L |
| 10 years | 670 – 1530 mg/dL | 44.9 - 103 µmol/L |
| 12 years | 700 – 1550 mg/dL | 46.9 – 104 µmol/L |
| 14 years | 710 – 1560 mg/dL | 47.6 – 105 µmol/L |
| 16 years | 720 – 1560 mg/dL | 48.2 – 105 µmol/L |
| 18 years | 730 – 1550 mg/dL | 48.9 – 104 µmol/L |
Each laboratory should check if the reference ranges are transferable to its own patient population and determine own reference ranges if necessary. For diagnostic purposes, the results should always be assessed with the patient’s medical history, clinical examinations and other findings.
For information on clinical relevance, please refer to the package insert.