Trends in Sexual Risk Behaviors Among High School Students -United States, 1991-1997

Morbidity and Mortality Weekly Report, Sept 18, 1998

                              Ever had sexual
                       Survey   intercourse
                        year         %         (95% [CI.sup.ss])
Sex
Male                    1991       57.4       ([plus or minus]4.1)
                        1993       55.6       ([plus or minus]3.5)
                        1995       54.0       ([plus or minus]4.7)
                        1997       48.8       ([plus or minus]3.4)
                        1991       50.8       ([plus or minus]4.0)
                        1993       50.2       ([plus or minus]2.5)
                        1995       52.1       ([plus or minus]5.0)
                        1997       47.7       ([plus or minus]3.7)
Grade
   9                    1991       39.0       ([plus or minus]5.0)
                        1993       37.7       ([plus or minus]4.2)
                        1995       36.9       ([plus or minus]5.9)
                        1997       38.0       ([plus or minus]3.8)
  10                    1991       48.2       ([plus or minus]5.7)
                        1993       46.1       ([plus or minus]3.6)
                        1995       48.0       ([plus or minus]5.1)
                        1997       42.5       ([plus or minus]4.3)
  11                    1991       62.4       ([plus or minus]3.2)
                        1993       57.5       ([plus or minus]3.5)
                        1995       58.6       ([plus or minus]5.0)
                        1997       49.7       ([plus or minus]5.2)
  12                    1991       66.7       ([plus or minus]4.4)
                        1993       68.3       ([plus or minus]4.6)
                        1995       66.4       ([plus or minus]4.0)
                        1997       60.9       ([plus or minus]6.5)
Race/[Ethnicity.sup.n]
  Non-Hispanic white    1991       50.0       ([plus or minus]3.2)
                        1993       48.4       ([plus or minus]2.8)
                        1995       48.9       ([plus or minus]5.0)
                        1997       43.6       ([plus or minus]4.2)
  Non-Hispanic black    1991       81.4       ([plus or minus]3.2)
                        1993       79.7       ([plus or minus]3.2)
                        1995       73.4       ([plus or minus]4.5)
                        1997       72.6       ([plus or minus]2.8)
  Hispanic              1991       53.1       ([plus or minus]3.5)
                        1993       56.0       ([plus or minus]4.1)
                        1995       57.6       ([plus or minus]8.6)
                        1997       52.2       ([plus or minus]3.6)

Total                   1991       54.1       ([plus or minus]3.5)
                        1993       53.0       ([plus or minus]2.7)
                        1995       53.1       ([plus or minus]4.5)
                        1997       48.4       ([plus or minus]3.1)


                       Four or more sex
                       partners during
                           lifetime
                              %               (95% CI)
Sex
Male                         23.4       ([plus or minus]3.0)
                             22.3       ([plus or minus]2.7)
                             20.9       ([plus or minus]2.6)
                             17.6       ([plus or minus]1.5)
                             13.8       ([plus or minus]1.8)
                             15.0       ([plus or minus]1.9)
                             14.4       ([plus or minus]3.5)
                             14.1       ([plus or minus]2.0)
Grade
   9                         12.5       ([plus or minus]2.9)
                             10.9       ([plus or minus]2.0)
                             12.9       ([plus or minus]3.0)
                             12.2       ([plus or minus]2.5)
  10                         15.1       ([plus or minus]2.8)
                             15.9       ([plus or minus]2.0)
                             15.6       ([plus or minus]2.0)
                             13.8       ([plus or minus]2.7)
  11                         22.1       ([plus or minus]3.6)
                             19.9       ([plus or minus]3.1)
                             19.0       ([plus or minus]3.7)
                             16.7       ([plus or minus]2.9)
  12                         25.0       ([plus or minus]4.0)
                             27.0       ([plus or minus]3.6)
                             22.9       ([plus or minus]3.5)
                             20.6       ([plus or minus]3.5)
Race/[Ethnicity.sup.n]
  Non-Hispanic white         14.7       ([plus or minus]1.8)
                             14.3       ([plus or minus]2.1)
                             14.2       ([plus or minus]2.4)
                             11.6       ([plus or minus]1.5)
  Non-Hispanic black         43.1       ([plus or minus]3.5)
                             42.7       ([plus or minus]3.8)
                             35.6       ([plus or minus]4.4)
                             38.5       ([plus or minus]3.6)
  Hispanic                   16.8       ([plus or minus]2.6)
                             18.6       ([plus or minus]3.1)
                             17.6       ([plus or minus]3.7)
                             15.5       ([plus or minus]2.4)

Total                        18.7       ([plus or minus]2.1)
                             18.7       ([plus or minus]2.0)
                             17.8       ([plus or minus]2.6)
                             16.0       ([plus or minus]1.4)



                       Currently sexually
                         [active.sup.*]
                               %                (95% CI)
Sex
Male                          36.8        ([plus or minus]3.4)
                              37.5        ([plus or minus]3.0)
                              35.5        ([plus or minus]3.5)
                              33.4        ([plus or minus]2.6)
                              38.2        ([plus or minus]3.4)
                              37.5        ([plus or minus]1.8)
                              40.4        ([plus or minus]4.2)
                              36.5        ([plus or minus]2.7)
Grade
   9                          22.4        ([plus or minus]3.9)
                              24.8        ([plus or minus]3.2)
                              23.6        ([plus or minus]4.0)
                              24.2        ([plus or minus]3.3)
  10                          33.2        ([plus or minus]4.6)
                              30.1        ([plus or minus]3.0)
                              33.7        ([plus or minus]3.1)
                              29.2        ([plus or minus]2.9)
  11                          43.3        ([plus or minus]3.6)
                              40.0        ([plus or minus]3.6)
                              42.4        ([plus or minus]4.4)
                              37.8        ([plus or minus]4.8)
  12                          50.6        ([plus or minus]4.5)
                              53.0        ([plus or minus]3.9)
                              49.7        ([plus or minus]3.9)
                              46.0        ([plus or minus]5.0)
Race/[Ethnicity.sup.n]
  Non-Hispanic white          33.9        ([plus or minus]2.8)
                              34.0        ([plus or minus]2.1)
                              34.8        ([plus or minus]3.9)
                              32.0        ([plus or minus]3.1)
  Non-Hispanic black          59.3        ([plus or minus]3.8)
                              59.1        ([plus or minus]4.4)
                              54.2        ([plus or minus]4.7)
                              53.6        ([plus or minus]3.2)
  Hispanic                    37.0        ([plus or minus]3.6)
                              39.4        ([plus or minus]3.7)
                              39.3        ([plus or minus]7.1)
                              35.4        ([plus or minus]3.9)

Total                         37.4        ([plus or minus]3.1)
                              37.5        ([plus or minus]2.1)
                              37.9        ([plus or minus]3.4)
                              34.8        ([plus or minus]2.2)


                           Condom use
                       during last sexual
                       [intercourse.sup.+]
                                %                (95% CI)
Sex
Male                          54.5         ([plus or minus]3.8)
                              59.2         ([plus or minus]3.8)
                              60.5         ([plus or minus]4.3)
                              62.5         ([plus or minus]2.8)
                              38.0         ([plus or minus]4.3)
                              46.0         ([plus or minus]2.8)
                              48.6         ([plus or minus]5.2)
                              50.8         ([plus or minus]3.0)
Grade
   9                          53.3         ([plus or minus]6.2)
                              61.6         ([plus or minus]5.7)
                              62.9         ([plus or minus]5.5)
                              58.8         ([plus or minus]5.6)
  10                          46.3         ([plus or minus]4.7)
                              54.7         ([plus or minus]4.5)
                              59.7         ([plus or minus]4.6)
                              58.9         ([plus or minus]3.6)
  11                          48.7         ([plus or minus]5.8)
                              55.3         ([plus or minus]3.0)
                              52.3         ([plus or minus}6.2)
                              60.1         ([plus or minus]5.2)
  12                          41.4         ([plus or minus]3.6)
                              46.5         ([plus or minus]4.0)
                              49.5         ([plus or minus]4.4)
                              52.4         ([plus or minus]3.5)
Race/[Ethnicity.sup.n]
  Non-Hispanic white          46.5         ([plus or minus]4.6)
                              52.3         ([plus or minus]3.9)
                              52.5         ([plus or minus]4.0)
                              55.8         ([plus or minus]2.0)
  Non-Hispanic black          48.0         ([plus or minus]3.8)
                              56.5         ([plus or minus]3.8)
                              66.1         ([plus or minus]4.8)
                              64.0         ([plus or minus]2.8)
  Hispanic                    37.4         ([plus or minus]6.2)
                              46.1         ([plus or minus]4.4)
                              44.4         ([plus or minus]11.1)
                              48.3         ([plus or minus]5.6)

Total                         46.2         ([plus or minus]3.3)
                              52.8         ([plus or minus]2.7)
                              54.4         ([plus or minus]3.5)
                              56.8         ([plus or minus]1.6)