Table 1 shows the proportion of girls and boys in the sample (normative and high risk children combined) who initiated sexual activity, tobacco use, and alcohol/drug use at the various time points (very early, early, or later) and who had (or caused) a pregnancy or contracted a sexually-transmitted disease. Rates are shown separately for girls and boys in the three demographic groups studied (e.g., urban African American, urban European American, and rural European American). Consistent with prior research, urban African American youth had earlier sexual activity and higher rates of pregnancy and STDs than the other groups, but there were few demographic differences for the timing of tobacco and alcohol/drug initiation.
