Table 2.

Distribution of Probability of Seroreversion at a Certain Age, by Quantile

Age (Months)		Probability of Seroreversiona	95% CI Age ±
8.7		.025	.83
9.4		.05	.65
10.2		.10	.50
11.8	Quartile	.25	.35
13.9	Median	.50	.30
16.4	Quartile	.75	.30
18.9		.90	.35
20.6		.95	.37
22.3		.975	.38

Abbreviation: CI, confidence interval.

^a Probability of seroreversion = Negative infinity to z cumulative area under the normal curve [(Log_e Age − 2.632)/0.24].