Gynecological history at baseline, stratified by ethnic group. Participants filled out a detailed questionnaire that included questions about ethnicity, education, employment, health habits, dietary habits and sexual history. Differences in diversity between groups African black vaginal samples were tested using a two-sided t -test. There were too few women of other races for meaningful comparisons. Axial measurements of levator muscle thickness were obtained at the level of the constrictor urethrae muscle. Significant African black vaginal associations between hypothesized correlates and UVS for adolescents in steady relationships vs casual relationships are displayed in Table 2.