Table 1.

Baseline characteristics of children enrolled and vaccinated in Study A and Study B (ATP cohort for persistence Month 12)

Characteristic		Study A	Study B
N		89	184
Age	Median	20.0 months	9.0 years
	Range	7–35 months	3–17 years
Gender	Female, n (%)	37 (41.6)	105 (57.1)
	Male, n (%)	52 (58.4)	79 (42.9)
Race	White – Caucasian / European heritage, n (%)	85 (95.5)	182 (98.9)
	Other, n (%)	4 (4.5)	2 (1.1)

Footnote: N = number of children.

n (%) = number (percentage) of children with the specified characteristic.