TABLE 4.

Longitudinal analysis of ELISA reactivity in sequential samples from 17 children

Agea (mo)	Ratio of OD to cutoff		% of samples with ratio of ≥1	Paired comparisonb
	Median	Range
0–0.5	1.49	1.15–2.93	100	X	X	X
0.5–1	0.88	0.6–1.96	25	X			X	X	X	X
1–3	1.04	0.74–2.5	54		X		X
3–6	1.14	0.75–2.39	60			X		X
6–12	1.51	1.09–2.89	100						X
12–48	1.6	1.0–2.85	100							X
P for paired comparisons	NAc	NA	NA	0.04	0.03	0.03	0.02	0.02	0.03	0.04

^aAge expressed as intervals of time after birth, with the upper limit being excluded and birth noted as 0.

^bXs show which age groups were compared. Indicated paired comparisons were performed using Wilcoxon’s rank sum test. Only significant differences are indicated (P < 0.05).

^cNA, not applicable.