Table 1.

Immunoglobulin standards used in evaluation of suspected CVID.

Cut off for Immunoglobulins 2 Standard deviation below the mean by Age and Gender (g/L)

	Male			Female
Age	IgG	IgA	IgM	IgG	IgA	IgM
4	5.1	0.36	0.35	5.3	0.33	0.42
7	6	0.48	0.37	5.9	0.44	0.45
10	6.6	0.57	0.38	6.4	0.52	0.48
14	6.6	0.64	0.4	6.8	0.62	0.5
18	6.5	0.68	0.41	6.9	0.69	0.52
20	6.5	0.71	0.41	6.9	0.71	0.53
30	6.5	0.8	0.43	6.8	0.75	0.57
40	6.6	0.87	0.42	6.7	0.78	0.55
50	6.6	0.93	0.4	6.6	0.81	0.49
60	6.7	0.98	0.39	6.5	0.85	0.45
70	6.8	1.03	0.38	6.5	0.9	0.42
80	6.9	1.07	0.37	6.5	0.96	0.39

^*Adapted from Reference distributions for immunoglobulins A, G, and M: A comparison of a large cohort to the world's literature.⁷⁷