Stuart J Semple
Biographic Data
| ID | 124557 |
|---|---|
| NAME | Stuart J Semple |
| GIVEN NAMES | Stuart J |
| FAMILY NAME | Semple |
| SIGNATURE | SEMPLE S J |
| AFFILIATIONS | University of California San Diego |
| ORCID | 0000-0002-9060-9113 |
| VERIFIED | Yes |
| TOTAL WORKS | 59 |
| TOTAL CITATIONS | 602 |
| AUTHOR COUNT | 59 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1988 |
| LATEST PUBLICATION YEAR | 2021 |
| H-INDEX | 4 |
Correlates of impulsivity among female sex workers in Mexico
Impulsivity is a trait characteristic that is associated with sexual risk behavior. We examined correlates of impulsivity among 602 female sex workers (FSWs) enrolled in a sexual risk reduction intervention in Mexico (2016-2020). Impulsivity was positively associated with condomless sex with clients. Higher levels of impulsivity were associated with greater use of alcohol and heavy drugs, use of illicit drugs with clients, sexual/physical abuse h…
Perceived barriers to pre-exposure prophylaxis use and the role of syndemic factors among female sex workers in the Mexico-United States border region
Female sex workers (FSWs) experience syndemic factors (e.g., polydrug use, hazardous alcohol consumption, client-perpetrated violence, depression, and sexually transmitted infections) that often heighten vulnerability to HIV and limit healthcare utilization. We hypothesized that syndemic factors will limit FSWs' uptake of pre-exposure prophylaxis (PrEP). From 2016 to 2017, 295 HIV-negative FSWs were enrolled in a behavioral HIV prevention trial i…
Recent HIV Infection among men who have sex with men and transgender women in Tijuana
OBJECTIVE: To characterize recent HIV infections among newly diagnosed men who have sex with men and transgender women in Tijuana. METHODS: Limiting Antigen (LAg)-Avidity testing was performed to detect recent HIV infection within a cohort of newly-diagnosed men who have sex with men and transgender women in Tijuana. Logistic regression was used to determine characteristics associated with recent infection. A partial transmission network was infe…
A Randomized Controlled Trial of a Texting Intervention to Maintain Sexual Risk Reduction with Clients Among Female Sex Workers in Tijuana and Ciudad Juarez, Mexico
HIV Prevention Method Preferences Within Sexual Partnerships Reported by HIV-Negative MSM and TW in Tijuana, Mexico
Vaginal washing and lubrication among female sex workers in the Mexico-US border region
ClincialTrials.gov ( NCT02447484 )
Mood, Meth, Condom Use, and Gender
Uptake of a Partner Notification Model for HIV Among Men Who Have Sex With Men and Transgender Women in Tijuana, Mexico
Are men’s misogynistic attitudes associated with poor mental health and substance use behaviors? An exploratory study of men in Tijuana, Mexico
Men's misogynistic attitudes (i.e., dislike or contempt for women) have been shown to be associated with men's perpetration of physical/sexual violence against women and poor health outcomes for women. However, these attitudes have rarely been examined for their influence on men's own health. This paper examines the socio-demographic, substance use, and mental health correlates of misogynistic attitudes among a binational sample of men (n=400) in…
Correlates of Sexual Violence Among Men Who Have Sex With Men in Tijuana, Mexico
Correlates of unprotected sex with male clients among female sex workers in 13 Mexican cities
This study examined correlates of unprotected vaginal and anal sex (UVA) with male clients among female sex workers (FSWs). Baseline data were gathered from 1089 FSWs recruited from 13 cities across Mexico enrolled in an evidence-based sexual risk reduction intervention. We used generalised estimating equations (GEE) to predict total UVA while controlling for the nested structure of the data. Total UVA with clients in the past month was examined …
Behavioral and Psychosocial Correlates of HIV Testing Among Male Clients of Female Sex Workers in Tijuana, Mexico
Risk Factors for Recent Intimate Partner Violence among Methamphetamine-Using Men and Women
The Substance Abuse, Violence, and HIV/AIDS (SAVA) syndemic model describes how the confluence of the three epidemics of substance abuse, violence, and HIV risk work synergistically to create excess burden among populations. We sought to identify risk factors associated with recent intimate partner violence (IPV) victimization among heterosexual methamphetamine (meth)-using men (n = 108) and women (n = 122) enrolled in FASTLANE-II, an HIV behavio…
Outness” as a Moderator of the Association Between Syndemic Conditions and HIV Risk-Taking Behavior Among Men Who Have Sex with Men in Tijuana, Mexico
Buffering Syndemic Effects in a Sexual Risk-Reduction Intervention for Male Clients of Female Sex Workers
Objectives. We sought to test the efficacy of a sexual risk intervention for male clients of female sex workers (FSWs) and examine whether efficacy was moderated by syndemic risk. Methods. From 2010 to 2014, we conducted a 2-arm randomized controlled trial (60-minute, theory-based, safer sex intervention versus a didactic time-equivalent attention control) that included 400 male clients of FSWs on the US–Mexico border with follow-up at 4, 8, and …
Behavioral and Psychosocial Correlates of Anal Sex Among Male Clients of Female Sex Workers in Tijuana, Mexico
“When You Get Old Like This … You Don't Run Those Risks Anymore”
Salivary cortisol and α‐amylase responses to repeated bouts of downhill running
The 24 h period group effect for salivary α-amylase suggested an adaptation in the sympathoadrenal system that may alter the systemic inflammatory response to exercise-induced muscle damage but may also reflect enhanced mucosal immunity
Hombre Seguro(Safe Men)
NCT01280838, Date of registration: January 19, 2011
Correlates of Self-Efficacy for Condom Use Among Male Clients of Female Sex Workers in Tijuana, Mexico
Social and behavioral characteristics of gharwalis who operate brothels in the Ganga-Jamuna area of Nagpur, India
Nagpur is an industrial hub in Maharashtra, a state in Central India that has the second highest HIV prevalence in the country. Approximately 3000 brothel-based female sex workers (FSWs) are estimated to be working in Nagpur's Ganga-Jamuna red light district. The extent to which brothel madams, known as gharwalis, support HIV/STI prevention for FSWs has not been examined. The present study sought to identify personal, social, and behavioral chara…
Perceived Stigma of Purchasing Sex Among Latino and Non-Latino Male Clients of Female Sex Workers in Tijuana, Mexico
Context Matters
Correlates of unprotected anal sex among men who have sex with men in Tijuana, Mexico
Interventions to promote HIV testing and condom use among men who have sex with men may want to consider venue-specific approaches, as well as focus on drug-use issues in the context of unsafe sex
Correlates of Drug Dealing in Female Methamphetamine Users
Caregiving and the Stress Process
This paper views caregiver stress as a consequence of a process comprising a number of interrelated conditions, including the socioeconomic characteristics and resources of caregivers and the primary and secondary stressors to which they are exposed. Primary stressors are hardships and problems anchored directly in caregiving. Secondary stressors fall into two categories: the strains experienced in roles and activities outside of caregiving, and …
Stress of Aids caregiving
This paper describes the stressors experienced by lovers and friends who were caregivers to AIDS patients and the social supports and coping strategies they drew on in efforts to mediate stress. From exploratory, intensive interviews with San Francisco men who provided care in their homes or those of the patients, three types of stressor were identified. One involves exigencies within the caregiver role itself, such as the demands and burdens enc…
A Qualitative Exploration of Female Sex Work in Tijuana, Mexico
Correlates of Sexual Violence Among Men Who Have Sex With Men in Tijuana, Mexico
Buffering Syndemic Effects in a Sexual Risk-Reduction Intervention for Male Clients of Female Sex Workers
Objectives. We sought to test the efficacy of a sexual risk intervention for male clients of female sex workers (FSWs) and examine whether efficacy was moderated by syndemic risk. Methods. From 2010 to 2014, we conducted a 2-arm randomized controlled trial (60-minute, theory-based, safer sex intervention versus a didactic time-equivalent attention control) that included 400 male clients of FSWs on the US–Mexico border with follow-up at 4, 8, and …
HIV Risk Profiles Among HIV-Positive, Methamphetamine-Using Men Who Have Sex with Both Men and Women
This study examined demographic characteristics, sexual risk behaviors, sexual beliefs, and substance use patterns in HIV-positive, methamphetamine-using men who have sex with both men and women (MSMW) (n = 50) as compared to men who have sex with men only (MSM) (n = 150). Separate logistic regressions were conducted to predict group membership. In the final model, of 12 variables, eight were independently associated with group membership. Factor…
How important are venue-based HIV risks among male clients of female sex workers? A mixed methods analysis of the risk environment in nightlife venues in Tijuana, Mexico
Are men’s misogynistic attitudes associated with poor mental health and substance use behaviors? An exploratory study of men in Tijuana, Mexico
Men's misogynistic attitudes (i.e., dislike or contempt for women) have been shown to be associated with men's perpetration of physical/sexual violence against women and poor health outcomes for women. However, these attitudes have rarely been examined for their influence on men's own health. This paper examines the socio-demographic, substance use, and mental health correlates of misogynistic attitudes among a binational sample of men (n=400) in…
Methamphetamine Use, Attitudes About Condoms, and Sexual Risk Behavior Among HIV-Positive Men Who Have Sex with Men
This study examined attitudes about condoms as a moderator of the relationship between methamphetamine use and sexual risk behavior in a sample of 297 HIV-positive, methamphetamine-using men who have sex with men (MSM). To test for a moderating effect of attitudes towards condoms, an interaction term was included in multiple regression analysis along with age, income, negative condom attitudes, frequency of methamphetamine use, and Beck depressio…
Efficacy of a Brief Behavioral Intervention to Promote Condom Use Among Female Sex Workers in Tijuana and Ciudad Juarez, Mexico
Objectives. We examined the efficacy of a brief behavioral intervention to promote condom use among female sex workers in Tijuana and Ciudad Juarez, Mexico. Methods. We randomized 924 female sex workers 18 years or older without known HIV infection living in Tijuana and Ciudad Juarez who had recently had unprotected sex with clients to a 30-minute behavioral intervention or a didactic control condition. At baseline and 6 months, women underwent i…
Sexual Risk Behavior of HIV-Positive Methamphetamine-Using Men Who Have Sex with Men
An HIV-Prevention Intervention for Sex Workers in Tijuana, Mexico
Female sex workers (FSW) are at high risk of acquiring sexually transmitted infections (STIs), including HIV, and putting their clients and other partners at risk for infection. There is considerable evidence that Social Cognitive Theory (SCT)–based interventions are effective in reducing high-risk sexual behavior among at-risk populations in the United States. However, no studies have been undertaken of such interventions with FSWs in Mexico, wh…
Correlates of Self-Efficacy for Condom Use Among Male Clients of Female Sex Workers in Tijuana, Mexico
Life Events and Sexual Risk Among HIV-Negative, Heterosexual, Methamphetamine Users
Identifying psychosocial factors associated with sexual risk behavior among methamphetamine users is essential to enhancing HIV and sexually transmitted infection prevention. This study examined the relationship between positive and negative life events and sexual risk behavior in a sample of 100 HIV-negative, heterosexually identified, methamphetamine-using men and women. Negative life event categories included death of a significant other, nega…
Stress of Aids caregiving
This paper describes the stressors experienced by lovers and friends who were caregivers to AIDS patients and the social supports and coping strategies they drew on in efforts to mediate stress. From exploratory, intensive interviews with San Francisco men who provided care in their homes or those of the patients, three types of stressor were identified. One involves exigencies within the caregiver role itself, such as the demands and burdens enc…
Caregiving and the Stress Process
This paper views caregiver stress as a consequence of a process comprising a number of interrelated conditions, including the socioeconomic characteristics and resources of caregivers and the primary and secondary stressors to which they are exposed. Primary stressors are hardships and problems anchored directly in caregiving. Secondary stressors fall into two categories: the strains experienced in roles and activities outside of caregiving, and …
HIV-Seropositive Parents
The Relationship Between Neuropsychological Functioning and Coping Activity Among HIV-Positive Men
Family Conflict and Depressive Symptoms
Motivations associated with methamphetamine use among HIV men who have sex with men
Gender Differences in the Sexual Risk Practices of HIV+ Heterosexual Men and Women
HIV-positive gay and bisexual men
This paper describes the sexual risk practices of 322 HIV-positive gay and bisexual men who reported having unprotected anal, oral or vaginal sex with an HIV-negative or unknown status partner(s) during the previous four months. Descriptive data on type of sex, partner types and number of partners are presented. Determinants of unprotected anal and oral intercourse were examined using a social cognitive framework. More unprotected anal sex was as…
Determinants of Condom Use Stage of Change Among Heterosexually-Identified Methamphetamine Users
A Qualitative Exploration of Female Sex Work in Tijuana, Mexico
An HIV-Prevention Intervention for Sex Workers in Tijuana, Mexico
Female sex workers (FSW) are at high risk of acquiring sexually transmitted infections (STIs), including HIV, and putting their clients and other partners at risk for infection. There is considerable evidence that Social Cognitive Theory (SCT)–based interventions are effective in reducing high-risk sexual behavior among at-risk populations in the United States. However, no studies have been undertaken of such interventions with FSWs in Mexico, wh…
Sexual Compulsivity in a Sample of HIV-Positive Methamphetamine-using Gay and Bisexual Men
Perceived Behavior of Others and Aids Risk Behavior Among Heterosexually-Identified Methamphetamine Users
This study used cross-sectional data to examine perceived risk behavior of social network members as a correlate of AIDS risk behavior in a sample of 230 heterosexually-identified, methamphetamine (meth) users. The highest ratings of risk behavior within participants' social networks were associated with meth use and non-use of condoms. Friends received the highest ratings in terms of overall perceived involvement in drug and sexual risk behavior…
Sexual Risk Behavior of HIV-Positive Methamphetamine-Using Men Who Have Sex with Men
Psychosocial and Behavioral Correlates of Depressed Mood Among Female Methamphetamine Users
Female methamphetamine (meth) users report more depressive symptoms than do males. This study examined psychosocial and behavioral correlates of depressed mood in 146 heterosexual, meth-using women in San Diego, CA. Sixty percent met Beck Depression Inventory (BDI) criteria for moderate to severe depressive symptoms (i.e., higher levels of depressive symptoms); 40% had minimal to mild depressive symptoms (i.e., lower levels of depressive symptoms…
Prevalence and Correlates of HIV Infection among Female Sex Workers in 2 Mexico–US Border Cities
BACKGROUND: We examined human immunodeficiency virus (HIV) prevalence and correlates among female sex workers (FSWs) in Tijuana and Ciudad Juarez, 2 large cities on the Mexico-US border. METHODS: FSWs aged > or =18 years underwent interviews and testing for HIV, syphilis, gonorrhea, and chlamydia. Logistic regression identified factors associated with HIV infection. RESULTS: In 924 FSWs, the prevalence of HIV, gonorrhea, chlamydia, and syphilis t…
Correlates of injection drug use among female sex workers in two Mexico–U.S. border cities
Sexual Marathons and Methamphetamine Use among HIV-Positive Men Who Have Sex with Men
Efficacy of a Brief Behavioral Intervention to Promote Condom Use Among Female Sex Workers in Tijuana and Ciudad Juarez, Mexico
Objectives. We examined the efficacy of a brief behavioral intervention to promote condom use among female sex workers in Tijuana and Ciudad Juarez, Mexico. Methods. We randomized 924 female sex workers 18 years or older without known HIV infection living in Tijuana and Ciudad Juarez who had recently had unprotected sex with clients to a 30-minute behavioral intervention or a didactic control condition. At baseline and 6 months, women underwent i…
Methamphetamine initiation among HIV-positive gay and bisexual men
This study describes factors associated with methamphetamine initiation in a racially diverse sample of 340 methamphetamine-using, HIV-positive gay and bisexual men. A factor analysis was conducted on reasons for initiation, and four factors were identified: to party, to cope, for energy, and to improve self-esteem. Methamphetamine to party accounted for more than one-third of the variance in the factor analysis. Methamphetamine to cope captured …
An exploration of contextual factors that influence HIV risk in female sex workers in Mexico
The present study examined the applicability of the Social Ecological Model for explaining condom use in a sample of female sex workers (FSWs) (N=435) participating in a behavioral intervention to increase condom use in Tijuana, Mexico. Using a multigroup path analysis, we compared women who work in bar settings (n=233) to those who worked on the street (n=202) with regard to an individual factor (self-efficacy), an interpersonal factor (client f…
Predictors of safer sex intentions and protected sex among heterosexual HIV-negative methamphetamine users
The purpose of this study was to test a version of the Theory of Planned Behavior (TPB) for predicting safe sex behavior in a sample of 228 HIV-negative heterosexual methamphetamine users. We hypothesized that, in addition to TPB constructs, participants' amount of methamphetamine use and desire to stop unsafe sex behaviors would predict intentions to engage in safer sex behaviors. In turn, we predicted that safer sex intentions would be positive…
Sexual Marathons and Methamphetamine Use among HIV-Positive Men Who Have Sex with Men
Life Events and Sexual Risk Among HIV-Negative, Heterosexual, Methamphetamine Users
Identifying psychosocial factors associated with sexual risk behavior among methamphetamine users is essential to enhancing HIV and sexually transmitted infection prevention. This study examined the relationship between positive and negative life events and sexual risk behavior in a sample of 100 HIV-negative, heterosexually identified, methamphetamine-using men and women. Negative life event categories included death of a significant other, nega…
Psychosexual and social-cognitive correlates of sexual risk behavior among male clients of female sex workers in Tijuana, Mexico
Male clients of female sex workers (FSWs) may act as a bridge to the general population contributing to the spread of HIV and other sexually transmitted infections (STIs) in the USA and Mexico. This study used cross-sectional data to identify psychosexual and social-cognitive factors associated with sexual risk behavior in a bi-national sample of 300 male clients of FSWs recruited in Tijuana, Mexico from June to October 2008. In a multiple regres…
Medicine (59 works) · Psychology (44 works) · Psychiatry (41 works) · Demography (38 works) · HIV, Drug Use, Sexual Risk (36 works) · HIV/AIDS Research and Interventions (35 works) · Sex work and related issues (34 works) · Clinical Psychology (32 works) · Environmental health (28 works) · Family medicine (28 works)