Table 1.

Diagnoses criteria for each PAD.

PAD	Diagnoses Criteria
CVID	IgG less than 2SD, IgA or IgM less than 2SD and <70% of Pneumovax serotype response
IgGD	IgG less than 2SD with IgA and IgM within normal limits
IgG2D	Total IgG within normal range and IgG subclass less than 2SD
SAbD	Total IgG, IgM and IgA within normal range and <70% of Pneumovax serotype response

In our institution, two standard deviations (2SD) for IgG, IgA, IgM and IgG subclass 2 for age equal and greater than 18 years old were defined as 768–1623, 70–408, 40–263 and 241–700 mg/dL, respectively.