Table 1.

Immunological data of XLA patients with IVS11 + 3G→T and the other mutations of the BTK gene.

	Age (years)	IgG	IgM	IgA	IgE	CD3	CD19
Patient 1	3	422	<5	<5	2·6	86·6	0·4
Patient2	29	480	63	151	269	85·2	2·1
Patient 3†	10	63	<5	<5
XLA 1	31	495	<5	<5	<0·3	88·9	0·1
XLA 2	31	459	<5	<5	<0·3	68·7	0·1
XLA 3	20	381	6	<5	<0·3	89·0	0·1

^†The serum immunoglobulin level except patient 3 is measured just before the immunoglobulin infusion. Patient 3's data is at 4 years old.