Table 1

Demographic and clinical characteristics of study participants.

Vaccine

N = 3783

Placebo

N = 3828


Mean age, years (SD)

32.7 (9.19)

32.7 (9.14)

1. Male, n (%)

1465 (39)

1520 (40)

Age stratum, n (%)

Age 18 - 34

2153 (57)

2181 (57)

Age 35 - 49

1630 (43)

1647 (43)

Race, n (%)

Caucasian

3166 (84)

3237 (85)

Black or African American

384 (10)

362 (9)

Asian

61 (2)

75 (2)

Native Hawaiian or Pacific Islander

10 (<1)

15 (<1)

Native American/Alaskan Native

18 (<1)

9 (<1)

Other

144 (4)

129 (3)

Received Prior Vaccination (≤ 2 years), n (%)

727 (19)

727 (19)


Jackson et al. BMC Infectious Diseases 2010 10:71   doi:10.1186/1471-2334-10-71

Open Data