Adela de la Torre

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 titers > or =1:8 was 6%, 6.4%, 13%, and 14.2%, respectively. Factors independently associated with HIV were the injection of cocaine (odds ratio [OR], 2.96); the smoking, snorting, or inhalation of methamphetamine (OR, 3.32); and syphilis titers > or =1:8 (OR, 4.16). CONCLUSIONS Culturally appropriate interventions are needed to identify and treat ulcerative sexually transmitted infections and reduce HIV risks associated with stimulants among FSWs in the Mexico-US border region.

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 interviews and testing for HIV, syphilis, gonorrhea, and chlamydia. RESULTS We observed a 40% decline in cumulative sexually transmitted illness incidence (P = .049) in the intervention group. Incidence density for the intervention versus control groups was 13.8 versus 24.92 per 100 person-years for sexually transmitted illnesses combined (P = .034) and 0 versus 2.01 per 100 person-years for HIV (P < .001). There were concomitant increases in the number and percentage of protected sex acts and decreases in the number of unprotected sex acts with clients (P < .05). CONCLUSIONS This brief behavioral intervention shows promise in reducing HIV and sexually transmitted illness risk behaviors among female sex workers and may be transferable to other resource-constrained settings.

Public health needs and scientific opportunities in research on Latinas.

Much of the research on womens health has not deepened our understanding of health issues affecting Latinas. Yet integration of research on Latinas into the womens health agenda is important for at least 2 reasons. First, critical public health issues facing Latinas must be better understood if effective interventions designed to eliminate racial and ethnic disparities in health are to be developed and implemented. Second, studies on the health of Latinas represent unique opportunities to advance scientific understandings of underlying processes relevant to the health of other populations. Such research can further our knowledge of the processes underlying cultural adaptation and negotiation of changing sex roles and how these issues affect the health of women. Critical research and empirical approaches that help us to understand how race, ethnicity, sex, and class shape the health of Latinas will inform broader public health issues.

An exploration of contextual factors that influence HIV risk in female sex workers in Mexico: The Social Ecological Model applied to HIV risk behaviors

Abstract 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 financial incentives), and a structural factor (condom access). Competing models showed differential impacts of these factors in the two venue-based groups. Having access to condoms was associated with greater self-efficacy and less unprotected sex in women who worked in bars. Among street-based FSWs, having clients offer monetary incentives for unprotected sex was related to greater unprotected sex, while having access to condoms was not. Understanding the contextual factors associated with condom use among subgroups of FSWs has important implications for the development of HIV prevention interventions.

Comparison of Sexual and Drug Use Behaviors Between Female Sex Workers in Tijuana and Ciudad Juarez, Mexico

Female sex workers (FSWs) have been documented to have high rates of sexually transmitted diseases and HIV in many parts of the world. However, little work has been done to characterize the prevalence of these infections along the U.S.–Mexican border, where sexual tourism and culturally sanctioned sex work among nationals is widespread. The objective of this study was to compare differences in background characteristics, HIV risk behaviors, drug use, and sexually transmitted infection/HIV prevalence between FSWs who participated in a behavioral risk intervention in two U.S.–Mexican border cities. Baseline data were collected from March 2004 through September 2005. Data from 295 FSWs were compared between Tijuana and Ciudad (Cd.) Juarez. Among 155 FSWs in Tijuana and 140 in Cd. Juarez, HIV seroprevalence was 4.8% and 4.9%, respectively. FSWs in Cd. Juarez were more likely to test positive for active syphilis (31.3%) compared with Tijuana (11.8%) but did not differ in terms of the prevalence of gonorrhea and chlamydia. FSWs in both sites reported high levels of unprotected sex and use of drugs; however, FSWs in Cd. Juarez were more likely than those in Tijuana to ever have injected drugs (75% vs. 25%, p <.001). Heroin and cocaine use and injection drug use were significantly more common in Cd. Juarez, whereas methamphetamine use was more common in Tijuana. Injection of vitamins was common in both cities. Logistic regression analyses suggested that being younger, working in Cd. Juarez, and using heroin or cocaine were independently associated with active syphilis infection. In Tijuana, methamphetamine use was strongly associated with active syphilis infection. These preliminary results suggest that risk profiles for HIV/sexually transmitted infection among FSWs in these two Mexico–U.S. border cities differ, suggesting a need to tailor interventions to the specific needs in each city.

A Sexual Risk Reduction Intervention for Female Sex Workers in Mexico

Abstract Female sex workers (FSWs) 18 or older who reported having unprotected sex with at least one client within the previous month were recruited in Tijuana and Ciudad Juarez, Mexico. After a baseline assessment, participants were randomly assigned to either: (1) Proyecto Comparte Sexo Mas Seguro (“Share Safer Sex”), a theory-based counseling intervention to increase the use of condoms; or (2) time-equivalent voluntary HIV counseling and testing. Participants had unprotected sex with approximately 27% of clients over the one-month reporting period, and approximately 5% of FSWs in both study conditions tested HIV-seropositive. FSWs in the intervention and comparison conditions showed no significant differences in baseline demographic characteristics, sexual risk behaviors, or HIV serostatus, which indicates that randomization was successful. Future challenges entail participant followup and evaluation of intervention effects.

History of abuse and psychological distress symptoms among female sex workers in two Mexico-U.S. border cities.

This study examined histories of past emotional, physical, and sexual abuse as correlates of current psychological distress using data from 916 female sex workers (FSWs) who were enrolled in a safer-sex behavioral intervention in Tijuana and Ciudad (Cd.) Juarez, Mexico. We hypothesized that histories of abuse would be associated with higher symptom levels of depression and somatization and that social support would moderate the relationship. Nonparametric correlations and a series of hierarchical regression analyses revealed that all forms of past abuse predicted higher levels of depressive symptoms, and physical and sexual abuse were significantly associated with higher levels of somatic symptoms. Social support was also significantly associated with fewer symptoms of distress; however, it was not shown to moderate the relationship between abuse history and distress.

Predictors of Sexual Risk Reduction Among Mexican Female Sex Workers Enrolled in a Behavioral Intervention Study

Objective: We recently showed efficacy of an intervention to increase condom use among female sex workers (FSWs) in Tijuana and Ciudad Juarez, situated on the Mexico-United States border. We determined whether increases in condom use were predicted by social cognitive theory and injection drug user status among women randomized to this intervention. Methods: Four hundred nine HIV-negative FSWs aged ≥18 years having unprotected sex with clients within the prior 2 months received a brief individual counseling session integrating motivational interviewing and principles of behavior change (ie, HIV knowledge, self-efficacy for using condoms, and outcome expectancies). Results: Increases in self-efficacy scores were associated with increases in percent condom use (P = 0.008), whereas outcome expectancies were not. Female sex workers who inject drugs (FSW-IDUs) increased condom use with clients but not to the same extent as other FSWs (P = 0.09). Change in HIV knowledge was positively associated with change in percent condom use among FSW-IDUs (P = 0.03) but not noninjection drug users. Conclusions: Increases in self-efficacy significantly predicted increased condom use among FSWs, consistent with social cognitive theory. Increased HIV knowledge was also important among FSW-IDUs, but their changes in condom use were modest. Enhanced interventions for FSW-IDUs are needed, taking into account realities of substance use during sexual transactions that can compromise safer sex negotiation.

Niños Sanos, Familia Sana: Mexican immigrant study protocol for a multifaceted CBPR intervention to combat childhood obesity in two rural California towns

BackgroundOverweight and obese children are likely to develop serious health problems. Among children in the U.S., Latino children are affected disproportionally by the obesity epidemic. Niños Sanos, Familia Sana (Healthy Children, Healthy Family) is a five-year, multi-faceted intervention study to decrease the rate of BMI growth in Mexican origin children in California’s Central Valley. This paper describes the methodology applied to develop and launch the study.Methods/DesignInvestigators use a community-based participatory research approach to develop a quasi-experimental intervention consisting of four main components including nutrition, physical activity, economic and art-community engagement. Each component’s definition, method of delivery, data collection and evaluation are described. Strategies to maintain engagement of the comparison community are reported as well.DiscussionWe present a study methodology for an obesity prevention intervention in communities with unique environmental conditions due to rural and isolated location, limited infrastructure capacity and limited resources. This combined with numerous cultural considerations and an unstable population with limited exposure to researcher expectations necessitates reassessment and adaptation of recruitment strategies, intervention delivery and data collection methods. Trial registration # NCT01900613.Trial registrationNCT01900613.

Correlates of food patterns in young Latino children at high risk of obesity

OBJECTIVE The present paper examines the influence of age and gender on food patterns of Latino children. DESIGN Data are from baseline of a 5-year, quasi-experimental obesity prevention study: Niños Sanos, Familia Sana (NSFS; Healthy Children, Healthy Families). In 2012, the researchers interviewed Latino parents, using a thirty-item questionnaire to ask about their childrens food consumption and feeding practices. Statistical tests included t tests and ANCOVA. SETTING Rural communities in Californias Central Valley, USA. SUBJECTS Two hundred and seventeen parents (87-89% born in Mexico) and their children (aged 2-8 years). RESULTS Fifty-one per cent of the children were overweight or obese (≥85th percentile of BMI for age and gender). Mean BMI Z-scores were not significantly different in boys (1·10 (SD 1·07)) and girls (0·92 (SD 1·04); P=0·12). In bivariate analysis, children aged 2-4 years consumed fast and convenience foods less often (P=0·04) and WIC (Supplemental Nutrition Program for Women, Infants, and Children)-allowable foods more often than children aged 5-8 years (P=0·01). In ANCOVA, neither age nor gender was significantly related to food patterns. Mothers acculturation level was positively related to childrens consumption of fast and convenience foods (P=0·0002) and negatively related to consumption of WIC foods (P=0·01). Providing role modelling and structure in scheduling meals and snacks had a positive effect on the vegetable pattern (P=0·0007), whereas meal skipping was associated with more frequent fast and convenience food consumption (P=0·04). CONCLUSIONS Acculturation and child feeding practices jointly influence food patterns in Latino immigrant children and indicate a need for interventions that maintain diet quality as children transition to school.