Trends In Sexual Risk Behaviors Research Articles

103. Trends in Sexual Risk Behaviors by Contraceptive Type Among High School Students—United States, 2007-2017

Increasing use of highly and moderately effective contraception has contributed to consistent declines in unintended pregnancies among young people. However, such methods do not prevent sexually transmitted diseases (STDs). To assess STD risk among adolescent users of highly and moderately effective contraception relative to other adolescents, we examine 10-year trends in sexual risk behaviors by contraceptive type among U.S. high school students.

Trends in Sexual Risk Behaviors Among Hispanic/Latino Men Who Have Sex with Men - 19 Urban Areas, 2011-2017.

Correct and consistent condom use and human immunodeficiency virus (HIV) preexposure prophylaxis (PrEP) are protective against sexual transmission of HIV (1,2). The incidence of HIV infection among Hispanic/Latino men who have sex with men (MSM) in the United States is increasing (3). HIV risk among Hispanic/Latino MSM differs based on their place of birth and years of U.S. residence (4). Data from CDC's National HIV Behavioral Surveillance (NHBS)* for 2011-2017 were analyzed to assess changes in sexual risk behaviors among Hispanic/Latino MSM by place of birth and years of U.S. residence. Overall, condomless anal sex during the previous 12 months increased from 63% in 2011 to 74% in 2017, and PrEP use during the previous 12 months increased from 3% in 2014 to 24% in 2017. Regardless of place of birth, nearly 75% of Hispanic/Latino MSM reported condomless anal sex during 2017. However, because of PrEP use, <60% of non-U.S.-born Hispanic/Latino MSM and <50% of U.S.-born Hispanic/Latino MSM reported unprotected anal sex (condomless anal sex and no PrEP use) during 2017. Results indicate that PrEP can be a vital tool for reducing HIV transmission among Hispanic/Latino MSM, especially those who have condomless anal sex. Interventions to prevent HIV acquisition, including increasing PrEP uptake, could address cultural and linguistic needs of Hispanic/Latino MSM, as well as other barriers to prevention of HIV infection typically faced by all MSM.

Behavioural disinhibition in the general population during the antiretroviral therapy roll‐out in Sub‐Saharan Africa: systematic review and meta‐analysis

Improved life expectancy and reduced transmission probabilities due to ART may result in behavioural disinhibition - that is an increase in sexual risk behaviour in response to a perceived lower risk of HIV. We examined trends in sexual risk behaviour in the general population of sub-Saharan African countries 1999-2015. We systematically reviewed scientific literature of sexual behaviour and reviewed trends in Demographic and Health Surveys. A meta-analysis on four indicators of sexual risk behaviour was performed: unprotected sex, multiple sexual partners, commercial sex and prevalence of sexually transmitted infections. Only two peer-reviewed studies met our inclusion criteria, while our review of DHS data spanned 18 countries and 16 years (1999-2015). We found conflicting trends in sexual risk behaviour. Reported unprotected sex decreased consistently across the 18 countries, for both sexes. In contrast, reporting multiple partners was decreasing over the period 1999 to the mid-2000s, yet has been consistently increasing thereafter. Similar trends were found for reported sexually transmitted infections and commercial sex (men only). In conclusion, we found no clear evidence of behavioural disinhibition due to expanded access to ART in sub-Saharan Africa. Substantial increases in condom use coincided with increases in reported multiple partners, commercial sex and sexually transmitted infections, especially during the period of ART scale-up. Further research is needed into how these changes might affect HIV transmission.

Targeted vaccination programme successful in reducing acute hepatitis B in men having sex with men in Amsterdam, The Netherlands

In the Netherlands, transmission of hepatitis B virus occurs mainly within behavioural high-risk groups, such as in men who have sex with men. Therefore, a vaccination programme has targeted these high-risk groups. This study evaluates the impact of the vaccination programme targeting Amsterdam's large population of men who have sex with men from 1998 through 2011. We used Amsterdam data from the national database of the vaccination programme for high-risk groups (January 1, 1998 to December 31, 2011). Programme and vaccination coverage were estimated with population statistics. Incidence of acute hepatitis B was analyzed with notification data from the Amsterdam Public Health Service (1992-2011). Mathematical modelling accounting for vaccination data and trends in sexual risk behaviour was used to explore the impact of the programme. At the end of 2011, programme coverage was estimated at 41% and vaccination coverage from 30% to 38%. Most participants (67%) were recruited from the outpatient department for sexually transmitted infections and outreach locations such as saunas and gay bars. Incidence of acute hepatitis B dropped sharply after 2005. The mathematical model in which those who engage most in high-risk sex are vaccinated, best explained the decline in incidence. Transmission of hepatitis B virus among Amsterdam's men who have sex with men has decreased, despite ongoing high-risk sexual behaviour. Vaccination programmes targeting men who have sex with men do not require full coverage; they may be effective when those who engage most in high-risk sex are reached.

P3.420 Targeted Vaccination Programme Successful in Reducing Acute Hepatitis B in Men Having Sex with Men in Amsterdam, the Netherlands

Background In the Netherlands, transmission of hepatitis B virus occurs mainly within behavioural high-risk groups, such as in men who have sex with men. Therefore, a vaccination programme has targeted these high-risk groups. Previous evaluations of this programme up until 2006 (incidence trend analysis, mathematical modelling and molecular sequence models) could prove no impact. This study evaluates the impact of the vaccination programme targeting Amsterdam’s large population of men who have sex with men from 1998 through 2011. Methods We used Amsterdam data from the national database of the vaccination programme for high-risk groups (January 1, 1998 to December 31, 2011). Programme and vaccination coverage were estimated with population statistics. Incidence of acute hepatitis B was analysed with notification data from the Amsterdam Public Health Service (1992 to 2011). Mathematical modelling accounting for vaccination data and trends in sexual risk behaviour was used to explore the impact of the programme. Results At the end of 2011, programme coverage was estimated at 41% and vaccination coverage 30% to 38%. Most participants (67%) were recruited from the outpatient department for sexually transmitted infections and outreach locations such as saunas and gay bars. Incidence of acute hepatitis B dropped sharply after 2005. The mathematical model in which those who engage most in high-risk sex are vaccinated, best explained the decline in incidence. Conclusions Transmission of hepatitis B virus among Amsterdam’s men who have sex with men has decreased, despite ongoing high-risk sexual behaviour. International concern also exists about the effectiveness of such programmes when the uptake or coverage remains low. This study proves that a targeted vaccination programme can be effective with vaccination coverage below 40%, as long as MSM who engage most in high-risk sex, such as clients of STI clinics, are reached.

Ongoing HIV-1 transmission among men who have sex with men in Amsterdam: a 25-year prospective cohort study

To examine the suggested resurgence of the HIV epidemic among men who have sex with men (MSM), we studied trends in HIV-1 incidence rates, sexual risk behaviour, risk factors for HIV-1 seroconversion, and source of HIV-1 infection among MSM in the Amsterdam Cohort Studies from 1984 to 2009. Trends in HIV-1 incidence and risk factors for HIV-1 infection were studied using Poisson regression. Trends in sexual risk behaviour were evaluated using logistic regression, correcting for intra-individual correlation via generalized estimating equations. Trends in the source of HIV-1 infection were modelled via logistic regression. Of 1642 HIV-1-negative individuals, 217 seroconverted during follow-up. HIV-1 incidence rates strongly decreased from 8.6/100 person-years in 1985 to 1.3/100 person-years in 1992; remained relatively stable around 1.0/100 person-years between 1992 and 1996, and slowly increased to 2.0/100 person-years in 2009 (P = 0.14; linear trend 1996-2009). Reports of unprotected anal intercourse (UAI) increased significantly from 1996 onwards. HIV-1 seroconversion was associated with receptive UAI with casual partners, more than five sexual partners, a history of gonorrhoea (all in the preceding 6 months), and a lower educational level. Currently, MSM are more likely to have contracted HIV-1 from casual partners than from steady partners, but trends of recent years suggest that steady partners became a growing source with increasing age. Following increases in sexual risk behaviour from 1996 onwards, HIV-1 continues to spread among MSM. Targeted prevention messages should continue to focus on sexual behaviour with casual partners, but also on sexual behaviour within steady relationships.

Monitoring trends in HIV prevalence among young people, aged 15 to 24 years, in Manicaland, Zimbabwe

BackgroundIn June 2001, the United Nations General Assembly Special Session (UNGASS) set a target of reducing HIV prevalence among young women and men, aged 15 to 24 years, by 25% in the worst-affected countries by 2005, and by 25% globally by 2010. We assessed progress toward this target in Manicaland, Zimbabwe, using repeated household-based population serosurvey data. We also validated the representativeness of surveillance data from young pregnant women, aged 15 to 24 years, attending antenatal care (ANC) clinics, which UNAIDS recommends for monitoring population HIV prevalence trends in this age group. Changes in socio-demographic characteristics and reported sexual behaviour are investigated.MethodsProgress towards the UNGASS target was measured by calculating the proportional change in HIV prevalence among youth and young ANC attendees over three survey periods (round 1: 1998-2000; round 2: 2001-2003; and round 3: 2003-2005). The Z-score test was used to compare differences in trends between the two data sources. Characteristics of participants and trends in sexual risk behaviour were analyzed using Student's and two-tailed Z-score tests.ResultsHIV prevalence among youth in the general population declined by 50.7% (from 12.2% to 6.0%) from round 1 to 3. Intermediary trends showed a large decline from round 1 to 2 of 60.9% (from 12.2% to 4.8%), offset by an increase from round 2 to 3 of 26.0% (from 4.8% to 6.0%). Among young ANC attendees, the proportional decline in prevalence of 43.5% (from 17.9% to 10.1%) was similar to that in the population (test for differences in trend: p value = 0.488) although ANC data significantly underestimated the population prevalence decline from round 1 to 2 (test for difference in trend: p value = 0.003) and underestimated the increase from round 2 to 3 (test for difference in trend: p value = 0.012). Reductions in risk behaviour between rounds 1 and 2 may have been responsible for general population prevalence declines.ConclusionsIn Manicaland, Zimbabwe, the 2005 UNGASS target to reduce HIV prevalence by 25% was achieved. However, most prevention gains occurred before 2003. ANC surveillance trends overall were an adequate indicator of trends in the population, although lags were observed. Behaviour data and socio-demographic characteristics of participants are needed to interpret ANC trends.

Trends in Sexual Risk Behaviors, by Nonsexual Risk Behavior Involvement, U.S. High School Students, 1991–2007

Background Adolescent health risk behaviors often occur together, suggesting that youth involvement with one risk behavior may inform understanding of other risk behaviors. We examined the association between involvement in nonsexual risk behaviors and trends among sexual behaviors. Methods We analyzed 1991–2007 data (n = ∼125,000) from the Youth Risk Behavior Survey, a nationally representative survey of high school students in the United States. We categorized students into groups based on lifetime (Lifetime Risk Scale) and recent involvement (Recent Risk Scale) in nonsexual risk behaviors, such as smoking and drug use. We examined each group's prevalence of and trends for four sexual behaviors: ever having had sexual intercourse, having four or more lifetime partners, current sexual activity, and use of contraception at last sex. Data were examined for linear and quadratic (U-shaped) change using logistic regression. Results Sexual behaviors varied considerably between youth engaged in no risk behaviors and those in the highest risk behavior groups: sevenfold for ever having had intercourse (13% vs. 87% in 2007) and threefold for four or more lifetime sexual partners (19% vs. 57%). Despite these differences, trends in sexual risk behaviors among youth engaged in multiple nonsexual risk behaviors and those engaged in few or no risk behaviors were remarkably similar. In contrast, sexual behaviors demonstrated a very different pattern of change from that found or nonsexual behaviors: sexual experience and having multiple sexual partners declined into the early 2000s and then increased, whereas nonsexual behaviors increased over time, peaked in the late 1990s, and then declined. Conclusions Youth who engaged in little risk taking and those who engaged in considerable risk taking showed similar trends over time. However, the pattern of changes in sexual and nonsexual risk behaviors were remarkably different, raising questions about the potential impact of interventions that would reduce sexual risk taking by reducing nonsexual risk behaviors. Recent increases in sexual risk behaviors may have ominous implications for prevention of unplanned pregnancy and sexually transmitted infections among youth.

HIV is hyperendemic among men who have sex with men in San Francisco: 10-year trends in HIV incidence, HIV prevalence, sexually transmitted infections and sexual risk behaviour

Objectives:To evaluate trends in the HIV epidemic among men who have sex with men (MSM) in San Francisco and the implications for HIV prevention.Methods:An ecological approach assessed temporal trends in...

HIV diagnoses in Australia: diverging epidemics within a low‐prevalence country

To describe recent trends in the diagnosis of HIV infection in Australia. Analysis of national surveillance system data for 1993-2006. Number and population rate of new HIV diagnoses by year, exposure route and demographic characteristics. Between 1993 and 2006, 12 313 new diagnoses of HIV infection were reported in Australia. From 1993 to 1999, the annual number of diagnoses declined by 32% from 1056 to 718, and then increased by 31% from 763 in 2000 to 998 in 2006. Between 2000 and 2006, diagnosis rates significantly increased in Victoria, Queensland, South Australia and Western Australia. The most frequent route of HIV exposure was male-to-male sex, accounting for 70% of diagnoses. Heterosexual contact accounted for 18% of cases, with just over half of these people born in or having a sexual partner from a high-prevalence country. Exposure by injecting drug use remained infrequent. The number of HIV diagnoses has risen in the past 7 years, but not in New South Wales, which has long had the highest rates. The differences in rates between states/territories are likely to be due to divergent trends in sexual risk behaviour in men having male-to-male sex, which remains the predominant route of HIV transmission in Australia. There is a need for effective, innovative and evidence-based programs for HIV prevention, particularly among men having male-to-male sex.

Perceived viral load, but not actual HIV-1-RNA load, is associated with sexual risk behaviour among HIV-infected homosexual men.

Increases in sexual risk behaviour and sexually transmitted infections among HIV-infected homosexual men after the introduction of highly active antiretroviral therapy (HAART) confirm the need for innovative prevention activities. The present study focused on time trends in sexual risk behaviour and predictors for unprotected anal intercourse in the HAART era among HIV-infected homosexual men. In 2000-2003, 57 HIV-infected homosexual men (mean age 45 years) were interviewed in three serial data waves. Logistic regression, correcting for repeated measurements, was used to assess time trends in risky sex, and the association between HAART-related beliefs, and both the perceived and actual viral load level and CD4 cell counts and subsequent risky sex. Risky sex with casual partners increased from 10.5% in 2000 to 27.8% in 2003 (P < 0.01), and with steady partners of negative or unknown HIV status from 5.3% to 10.7% (P = 0.6). Homosexual men with a favourable perception of their viral load were more likely to engage in subsequent risky sex with steady partners of negative or unknown HIV status than men with a less favourable perception of their viral load; this association was independent of the actual HIV-1-RNA load and CD4 cell counts. Risky sex increased in this group of HIV-infected homosexual men. The perceived viral load, but not the actual load, is associated with subsequent risky sex with steady partners of negative or unknown HIV status. Care givers should discuss with patients not only their actual viral load and CD4 cell count but also their perceived viral load.

Trends in Sexual Risk Behaviors Among High School Students—United States, 1991-2001

Trends in Sexual Risk Behaviors Among High School Students—United States, 1991-2001

Trends in Sexual Risk Behaviors Among High School Students--United States, 1991-2001

Unprotected sexual intercourse places young persons at risk for human immunodeficiency virus (HIV) infection, other sexually transmitted diseases (STDs), and unintended pregnancy. Responsible sexual behavior among adolescents is one of the 10 leading health indicators of the national health objectives for 2010 (objective 25.11). To examine changes in sexual risk behavior that occurred among high school students in the United States during 1991-2001, CDC analyzed data from six national Youth Risk Behavior surveys (YRBS). This report summarizes the results of the analysis, which indicate that, during 1991-2001, the percentage of U.S. high school students who ever had sexual intercourse and the percentage who had multiple sex partners decreased. Among students who are currently sexually active, the prevalence of condom use increased, although it has leveled off since 1999. However, the percentage of these students who used alcohol or drugs before last sexual intercourse increased. Despite decreases in some sexual risk behaviors, efforts to prevent sexual risk behaviors will need to be intensified to meet the national health objective for responsible sexual behavior.

Going underground and going after women: trends in sexual risk behaviour among gold miners in South Africa.

This paper examines trends in risk behaviour among South African gold miners, a population with an estimated HIV prevalence of 10-20%. The study is based on a 1995 and 1997 survey of a random sample gold miners in the town of Welkom, South Africa. The results show that the percentage of miners who perceived they were likely to contract HIV increased from 33% in 1995 to 35% in 1997 (P<0.01). The percentage who had 4 or more partners in the past year decreased from 25% to 13% (P < 0.01), and the percentage whose last sexual partner was their spouse increased from 56% to 70% (P<0.01). Condom use in last intercourse with a spouse increased from 18% to 26% (P < 0.05). Condom use with other partners was considerably higher (67%), but did not increase significantly from 1995. The most likely contributors to this behaviour change were the AIDS awareness programmes implemented by the mining industry and the behaviour change communications of a condom social marketing campaign targeted at miners and commercial sex workers in the mining community.

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

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

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

To examine changes in sexual risk behavior that occurred among high school students in the United States during 1991-2001 CDC analyzed data from six national Youth Risk Behavior surveys (YRBS). This report summarizes the results of the analysis which indicate that during 1991-2001 the percentage of U.S. high school students who ever had sexual intercourse and the percentage who had multiple sex partners decreased. Among students who are currently sexually active the prevalence of condom use increased although it has leveled off since 1999. However the percentage of these students who used alcohol or drugs before last sexual intercourse increased. Despite temporal changes for sex race/ethnicity and grade subgroups were analyzed by using separate logistic regression analyses that assessed linear and quadratic time effects in one type of subgroup while holding the other two constant. Quadratic trends indicated a significant but nonlinear trend in the data over time. When a significant quadratic trend accompanied a significant linear trend the data demonstrated some nonlinear variation (e.g. leveling off or change in direction) in addition to a linear trend. During 1991-2001 the prevalence of sexual experience decreased 16% among high school students. Logistic regression decreases in some sexual risk behaviors efforts to prevent sexual risk behaviors will need to be intensified to meet the national health objective for responsible sexual behavior. (excerpt)

Trends in sexual risk behaviour among Turkish/Moroccan adolescents in The Netherlands 1990-195

Background: in 1990, a national survey on adolescent sexuality showed that Turkish/Moroccan students were at special risk for sexually transmitted diseases. In 1995 the study was repeated. This article describes trends in the safe sex knowledge and sexual behaviour of Turkish/Moroccan students. The results are also seen in relation to those of Dutch students. Methods: data were collected from representative samples of students aged 11-18 years old in 1990 and in 1995, using structured questionnaires. Results: knowledge about AIDS among Turkish/Moroccan students increased. Boys became more permissive in their sexual attitudes, though the proportion of boys with coital experience did not change. Condom use among boys increased from 49 to 75%. The differences in sexual attitudes and behaviour between Turkish/Moroccan boys and girls increased. The Turkish/Moroccan boys became more similar to their Dutch counterparts, while the Turkish/Moroccan girls did not. Conclusions: these results suggest that safe sex education may have advantageous effects on Turkish/Moroccan adolescents' risk of sexually transmitted diseases.