TABLE 6.

Baseline demographics of students in the longitudinal phase of the study

CharacteristicNo. (%) of studentsa
A. actinomycetemcomitans positive (n= 38)A. actinomycetemcomitans negative (n = 58)
Ethnicity
    African-American18 (47.7)25 (43.1)
    Hispanic18 (47.7)33 (56.9)
    Asian1 (2.6)0 (0.0)
    Other1 (2.6)0 (0.0)
Gender
    Male20 (52.6)28 (48.2)
    Female18 (47.4)30 (51.7)
  • a The mean ± standard deviation ages of the A. actinomycetemcomitans-positive and -negative groups are 15.7 ± 0.3 and 14.4 ± 0.2 years, respectively.