Table II.

Cytokine ratios from mitogen-induced cytokine production from CBMCs of infants at birth and PBMCs at 3 mo

Cytokine Ratios	Infants at Birth	Infants at 3 mo
IFN-γ:IL-4
Log mean	NCa	2.7812
Log SD	NC	0.5044
n	293	322
IFN-γ:IL-13
Log mean	0.4819b,c	0.7386c
Log SD	0.4837	0.4601
n	268	310
IFN-γ:IL-10
Log mean	1.0401c	0.9444c
Log SD	0.6460	0.5002
n	293	322

^aNC, Not computed because of large proportion of undetectable IL-4 values.

^bp < 0.001 comparing infants at birth to infants at 3 mo.

^cp < 0.001 comparing infants to mothers postpartum (from Table I).