TABLE 3.

Comparison between conjugate-induced serum Streptococcus pneumoniae type 14 geometric mean Ab levels measured by RIA and those measured by ELISA (IgG)^a

Conjugate	Injection	Geometric mean		r	P
		RIA	ELISA
Pn14-rARU	1st	723	0.90	0.73138	0.02
	2nd	2,232	4.38	0.97738	0.0001
	3rd	3,732	6.41	0.89505	0.0005
Pn14-rARUsucc	1st	682	0.71	0.94647	0.0001
	2nd	3,985	6.10	0.94233	0.0001
	3rd	5,725	9.76	0.88912	0.0006

^aPneumococcal type 14 Abs were measured by ELISA expressed as units (Materials and Methods) and by RIA expressed as nanograms of Ab nitrogen per milliliter of serum (35, 36).