Table 1

Demographic parameters of the high-risk and low-risk cohorts

Low-risk cohort
(n=359)
High-risk cohort
(n=400)
N (%)N (%)
Gender (% female)189 (52.6)272* (68)
Age (mean)15.515.5
Population group
 Black South African17 (4.7)400* (100)
 White South African319* (88.8)0 (0)
 Mixed South African23* (6.4)0 (0)
  • *P<0.001.