Water, sanitation, and hygiene access among people who inject drugs in Tijuana and San Diego in 2020-2021: a cross-sectional study

BACKGROUND

Water, sanitation, and hygiene (WASH) access is critical to public health and human dignity. People who inject drugs (PWID) experience stigma and structural violence that may limit WASH access. Few studies have assessed WASH access, insecurity, and inequities among PWID. We describe WASH access, social and geographic inequalities, and factors associated with WASH insecurity among PWID in the Tijuana-San Diego metropolitan area.

METHODS

In this cross-sectional binational study, we interviewed PWID (age 18+) in 2020-2021 about WASH access and insecurity. City of residence (Tijuana/San Diego) and housing status were considered as independent variables to describe key WASH access outcomes and to assess as factors associated with WASH insecurity outcomes. Measures of association between outcomes and independent variables were assessed using log modified-Poisson regression models adjusting for covariates.

RESULTS

Of 586 PWID (202 Tijuana; 384 San Diego), 89% reported basic access to drinking water, 38% had basic hand hygiene, 28% basic sanitation, and 46% access to bathing, and 38% reported recent open defecation. Participants residing in Tijuana reported significantly higher insecurity in accessing basic drinking water (aRR: 1.68, 95%CI: 1.02-2.76), basic hygiene (aRR: 1.45, 95%CI: 1.28-1.64), and bathing (aRR: 1.21, 95%CI: 1.06-1.39) than those living in San Diego. Participants experiencing unsheltered homelessness experienced significantly higher insecurity in accessing basic drinking water (aRR: 2.03, 95%CI: 1.07-3.86), basic sanitation (aRR: 1.68, 95%CI: 1.48, 1.92), bathing (aRR: 1.84, 95%CI: 1.52-2.22), and improved water sources for cleaning wounds (aRR: 3.12, 95%CI: 1.55-6.29) and for preparing drugs (aRR: 2.58, 95%CI: 1.36-4.89) than participants living in permanent housing.

CONCLUSION

WASH access among PWID in the Tijuana-San Diego metropolitan area was low by international standards and lower than the national averages in both countries. Homelessness was significantly associated with WASH insecurity in this population. Concentrated efforts are needed to guarantee continuously available WASH services for PWID-especially those who are unsheltered.

The Impact of Cultural Health Capital on Market Choice Along the Texas-Mexico Border

Transnational cultural health capital (CHC) includes individual resources such as skills and behaviors patients use to manage healthcare exclusion and negotiate care. This study examines the impact of CHC on decisions by Hispanic people who live in El Paso, Texas, to utilize one or more markets for healthcare. We expand on the current literature and present novel findings by quantifying several aspects of CHC that may contribute to cross-border health-seeking behaviors in this vulnerable group which tends to suffer various health disparities and limited access to health insurance. Results support the hypotheses related to how the various cultural, social, and economic resources that comprise CHC affect market choices. This research has significant implications for understanding how border residents may mitigate a lack of accessibility and affordability for healthcare, developing transnational health policy, and aiding healthcare providers to understand their patients' choice(s) of healthcare markets.

Risk Factors for 30-day Hospital Readmissions After Peripheral Vascular Interventions in Peripheral Artery Disease Patients at the US-Mexico Border

Peripheral artery disease (PAD) is associated with high rates of readmission following endovascular interventions and contributes to a significant hospital readmission burden. Quality metrics like hospital readmissions affect hospital performance, but must adjust to local trends. Our primary goal was to evaluate risk factors and readmission rates post-percutaneous peripheral intervention in a US-Mexico border city, at a single tertiary university hospital. We performed a retrospective review of patients with PAD undergoing first time peripheral intervention from July 2015 to June 2020. Among 212 patients, 58% were readmitted with median 235-day follow-up (inter-quartile range (IQR) 42-924); 35.3% of readmissions occurred within 30 days, and 30.2% of those were within 7 days. Median time to readmission was 62 days. Active smokers had 84% higher risk of readmission (hazard ratio (HR) 1.84, 95% CI 1.23-2.74, P < .01). Other significant factors noted were insurance status-Medicaid or uninsured (HR 1.94, 95% CI 1.22-3.09), prior amputation (HR 1.69, 95% CI 1.13-2.54), heart failure, both preserved (HR 4.35, 95% CI 2.07-9.16) and reduced ejection fraction (HR 1.88, 95% CI 1.14-3.10). Below the knee, interventions were less likely to be readmitted (adjusted HR .64, 95% CI 0.42-.96). Readmission rates were unrelated to medication adherence.

Racial, ethnic and gender trends in lung cancer mortality rates in the United States-Mexico border and non-border areas

BACKGROUND

Geographic patterns of lung cancer mortality rate differ in the region bordering Mexico in contrast to the US. This study compares lung cancer mortality between border and non-border counties by race/ethnicity and gender.

METHODS

This study utilized population-level death certificate data from US Centers for Disease Control and Prevention Public Internet Wide-Ranging Online Data for Epidemiologic Research dataset between 1999 and 2020. Established algorithms were implemented to examine lung cancer deaths among US residents. We analyzed the age-adjusted data by year, race/ethnicity, gender, and geographic region. Joinpoint regression was used to determine mortality trends across time.

RESULTS

Lung cancer mortality rates were lower in border counties compared to non-border counties across time (p < 0.05). Hispanic lung cancer mortality rates were not different in border counties compared to non-border counties during the same period (p > 0.05). Lung cancer mortality among non-Hispanic White living in border counties was lower than non-Hispanic White residing in non-border counties (p < 0.01), and non-Hispanic Black living in border counties had lower lung cancer mortality than non-Hispanic Black in non-border counties in all but three years (p < 0.05). Both female and male mortality rates were lower in border counties compared to non-border counties (p < 0.05).

CONCLUSION

Differences in lung cancer mortality between border counties and non-border counties reflect lower mortality in Hispanics overall and a decline for non-Hispanic White and non-Hispanic Black living in border counties experiencing lower lung cancer mortality rates than non-border counties. Further studies are needed to identify specific causes for lower mortality rates in border counties.

US-Mexico Border Stress and Daily Substance Use among Latino Youth: a Cross-Sectional Study

Background

Historically marginalized youth are at risk for daily substance use. Daily use may be associated with social and environmental factors.

Methods

In March 2018, we surveyed primarily Latino adolescents ages 14-18 who lived on the US-Mexico border and assessed associations between daily substance use, neighborhood stress, border community and immigration stress, and family support.

Results

Of 443 surveyed adolescents, 41 (9%) reported daily use. Those who used daily were more likely to be older, identify as male, and reported lower social support and higher neighborhood and border community stress compared to those who did not use daily. Perceived neighborhood stress (OR = 1.95, 95% CI 1.37-2.80) and border community and immigration stress (OR = 1.55, 95% CI 1.12-2.02) were associated with increased odds of daily substance use.

Discussion

Latino adolescents who live near the US-Mexico border experience unique socioenvironmental stress which is associated with daily substance use.

At the border: A call to action for health equity for children with leukemia

We invite public health policy makers to be cognizant of the importance of where persons reside and consider focusing efforts to improve cancer outcomes in rural areas with concentrated poverty. We call for the attention of public health leaders and healthcare providers in both the US and Mexico to mitigate the health disparities suffered by immigrants, a population that plays a vital role for the economies and social fabric of these two countries.

Ethnic disparities in childhood leukemia survival by border residence: A Texas population-based analysis

BACKGROUND

The US-Mexico border is a medically underserved region where survival disparities have been observed in adults diagnosed and treated for various malignancies. Studies examining survival disparities among children living in this region and diagnosed with cancer are lacking. The objective of this study was to evaluate the impact of border residence on survival among children with acute lymphoblastic leukemia (ALL), acute myeloid leukemia (AML), and living near the Texas-Mexico border at the time of their diagnosis. The authors hypothesized that this group experiences inferior survival compared with patients with childhood leukemia living in nonborder areas.

METHODS

The authors conducted a retrospective survival analysis leveraging data from the Texas Cancer Registry. The study included patients aged birth to 19 years who were diagnosed with ALL or AML between 1995 and 2017. Cox proportional hazards models were used to evaluate the factors associated with the risk of death. Overall survival estimates were calculated using Kaplan-Meier methods.

RESULTS

During the study period, there were 6002 children diagnosed with ALL and 1279 diagnosed with AML. Inferior 5-year overall survival was observed among children with ALL living along the border region compared with those living in nonborder areas (77.5% vs. 85.8%). In adjusted models, children with ALL living along the border experienced a 30% increased hazard of death versus children living in nonborder areas. In contrast, for children with AML, survival estimates did not vary by border versus nonborder residence.

CONCLUSIONS

Living along the border was associated with inferior survival among children with ALL, but not among children with AML. Additional studies are urgently needed to identify the factors driving these disparities to effectively design multilevel interventions and influence state and national cancer control programs.

"Letting die" by design: Asylum seekers' lived experience of postcolonial necropolitics

Although the United States has been a nation of immigrants since its founding, the massive number of asylum seekers arriving at the US-Mexico Border is a relatively new phenomenon that requires attention and study. This paper describes the lived experience of three asylum seekers, demonstrating how physical and mental health are structured by US policies and politics. The in-depth accounts are informed by participant observation and policy analysis of humanitarian, non-governmental organizations advocating for asylum seekers. We focus on health and geographical trajectories using the triple trauma paradigm that includes trauma in the country of origin, trauma incurred during transit/flight, and the trauma of arrival and relocation/resettlement in the host country. We suggest that a form of necropower, understood as processes exacerbating the potentiality for death, is embedded in the structure of the US asylum apparatus.

A narrative-based approach to understand the impact of COVID-19 on the mental health of stranded immigrants in four border cities in Mexico

Objective

This paper describes the impact that the different COVID-19 related restrictions have had on the mental health and wellbeing of 57 Central American and Caribbean immigrants stranded in Mexico due to the pandemic.

Methods

Ethnographic data was obtained through the application of in-depth interviews centered on topics such as migration history, personal experience with COVID-19 and beliefs about the pandemic. This information was further analyzed through a narrative approach and Atlas Ti.

Main findings

US Title 42 and the Migrant Protection Protocols (MPP) have stranded thousands of individuals in the US-Mexico border region, a situation that has overcrowded the available shelters in the area and forced many of the immigrants to live on the streets and in improvised encampments. Thus, exposing them to a higher risk of contagion. Furthermore, the majority of the interviewed Central American and Caribbean immigrants consider that Mexico is more lenient when it comes to the enforcement of sanitary measures, especially when compared to their countries of origin. Finally, vaccination hesitancy was low among the interviewees, mainly due to the operative aspects of the vaccination effort in Mexico and the fear of ruining their chances to attain asylum in the US. These findings are backed up by the discovery of five recurring narratives among the interviewees regarding: (1) The pandemic's psychological impact. (2) The uncertainty of being stranded in Mexico and the long wait. (3) Their fear of violence over the fear of contagion. (4) The perceived leniency of Mexico with the pandemic when compared to their countries of origin, and (5) their beliefs about the pandemic and vaccines.

Key finding

The mental health of stranded Central American and Caribbean immigrants in Mexico during the COVID-19 pandemic is mostly affected by their inability to make it across the US-Mexico border using legal means.

Correlates of recent overdose among people who inject drugs in the San Diego/Tijuana border region

BACKGROUND

Along the Mexico-US border, illicitly manufactured fentanyls (fentanyl) have been detected in other illicit drugs, including street opioid formulations known as 'china white.' We studied correlates of recent overdose among people who inject drugs (PWID), focusing on the risk of knowlingly or unknowingly using fentanyl in china white.

METHODS

From October 2020 - September, 2021 we surveyed participants in San Diego, California and Tijuana, Mexico and employed Poisson regression to identify correlates of recent overdose.

RESULTS

Of 612 PWID, most were male (74.0 %), Latinx (71.9 %), US residents (67.0 %). Mean age was 43 years. In the last six months, 15.8 % experienced overdose, 31.0 % knowingly used fentanyl and 11.1 % used china white, of whom 77.9 % did not think it contained fentanyl. After controlling for sex and race, factors independently associated with risk of overdose included knowingly using fentanyl, using china white and not believing it contained fentanyl, recent drug rehabilitation, being stopped/arrested by police, and homelessness. Further, PWID who believed china white contained fentanyl were less likely to use it.

CONCLUSIONS

Both intentional fentanyl use and unintentional exposure to fentanyl via china white were associated with overdose risk; however, PWID who believed china white contained fentanyl were less likely to use it. These data suggest that advanced drug checking systems should be implemented to empower PWID to avoid dangerous street formulations or to plan their drug use knowing its contents. Other overdose risk factors such as decreased tolerance following drug treatment, police interactions, and homelessness also require urgent intervention.

Carcinogenic air pollution along the United States' southern border: Neighborhood inequities in risk

Air pollution poses serious and socially inequitable risks to public health. Social disparities are marked along the US-Mexico border, yet prior research has not assessed inequities in air pollution exposure across the entire US-side of the border region. We apply an intersectional approach to examine contextually relevant sociodemographic variables, including (1) Hispanic/Latinx ethnicity by race and (2) nativity (US vs. Foreign) by citizenship, and cancer risks attributable to air pollution exposures. We pair data from the 2012-2016 American Community Survey with 2014 National Air Toxics Assessment estimates of carcinogenic risks from all sources of hazardous air pollutants at the census tract level (n = 1448) and use a series of generalized estimating equations to assess inequities in risk. Increased concentrations of renter-occupants, Hispanics, mid-to-high socioeconomic status households, and foreign-born citizens were associated with elevated risks. Hispanic ethnicity intersected with non-White racial identification to amplify risks. In contrast, increased concentrations of non-Hispanic Black people and foreign-born non-citizens were not associated with disparate risks. To ameliorate environmental health inequities in this context, research and policy actions must be tailored to the US-Mexico border and consider intersectional positions within the Hispanic population.

Deported, homeless, and into the canal: Environmental structural violence in the binational Tijuana River

Introduction:

The US deports more Mexicans to Tijuana than any other borderland city. Returning involuntarily as members of a stigmatized underclass, many find themselves homeless and de-facto stateless. Subject to routinized police victimization, many take refuge in the Tijuana River Canal (El Bordo). Previous reports suggest Tijuana River water may be contaminated but prior studies have not accessed the health effects or contamination of the water closest to the river residents.

Methods:

A binational, transdisciplinary team undertook a socio-environmental, mixed methods assessment to simultaneously characterize Tijuana River water quality with chemical testing, assess the frequency of El Bordo residents’ water-related diseases, and trace water contacts with epidemiological survey methods (n = 85 adults, 18+) in 2019, and ethnographic methods in 2019–2021. Our analysis brings the structural violence framework into conversation with an environmental injustice perspective to documented how social forces drive poor health outcomes enacted through the environment.

Results:

The Tijuana River water most proximate to its human inhabitants fails numerous water-quality standards, posing acute health risks. Escherichia coli values were ∼40,000 times the Mexican regulatory standard for directly contacted water. Skin infections (47%), dehydration (40%) and diarrhea (28%) were commonly reported among El Bordo residents. Residents are aware the water is contaminated and strive to minimize harm to their health by differentially using local water sources. Their numerous survival constraints, however, are exacerbated by routine police violence which propels residents and other people who inject drugs into involuntary contact with contaminated water.

Discussion:

Human rights to drinking water, sanitation and hygiene are routinely violated among El Bordo in-habitants. This is exacerbated by violent policing practices that force unhoused deportees to seek refuge in waterways, and drive water contacts. Furthermore, US-Mexico ‘free-trade’ agreements drive rapid growth in Tijuana, restrict Mexican environmental regulation enforcement, and drive underinvestment in sewage systems and infrastructure.

Perceived Normalization of Drug Trafficking and Adolescent Substance Use on the US-Mexico Border

BACKGROUND

Historically marginalized youth are at risk for daily substance use. Daily use may be associated with social and environmental factors.

METHODS

In March 2018, we surveyed primarily Latino adolescents ages 14-18 who lived on the US-Mexico border and assessed associations between daily substance use, neighborhood stress, border community and immigration stress, and family support.

RESULTS

Of 443 surveyed adolescents, 41 (9%) reported daily use. Those who used daily were more likely to be older, identify as male, and reported lower social support and higher neighborhood and border community stress compared to those who did not use daily. Perceived neighborhood stress (OR = 1.95, 95% CI 1.37-2.80) and border community and immigration stress (OR = 1.55, 95% CI 1.12-2.02) were associated with increased odds of daily substance use.

DISCUSSION

Latino adolescents who live near the US-Mexico border experience unique socioenvironmental stress which is associated with daily substance use.

Occupational Stressors and Access to COVID-19 Resources among Commuting and Residential Hispanic/Latino Farmworkers in a US-Mexico Border Region

Hispanic/Latino and migrant workers experience high degrees of occupational stress, constitute most of California’s agricultural workforce, and were among the most impacted populations by the COVID-19 pandemic. However, relatively little is known about the occupational stress experienced by farmworkers who commute daily between the US and Mexico. Occupational stress is considered an imbalance between the demands at work and the capabilities to respond in the context of the workforce. The goal of this study is to determine the type and severity of stressors in daytime and resident farmworkers and how COVID-19 vaccination status contributes to these stressors. Interviews containing the Migrant Farmworker Stress Inventory (MSWSI) were administered to a sample of 199 Hispanic/Latino farmworkers in Imperial County, a multi-billion-dollar agriculture sector in the US. Principal factor analysis differentiated latent factors in the MFSWI. Simple linear regression models and correlations identified associations between MFWSI scores and sample characteristics. The MFWSI reduced to five stressor domains: Health and Well-Being Vulnerabilities, Inadequate Standards of Living/Unknown Conditions of Living, Working Conditions, Working Environment, and Language Barriers. Approximately 40 percent of the respondents reported significant stress levels, with foreign-born (p = 0.014) and older respondents (p = 0.0415) being more likely to experience elevated stress regardless of their nighttime residence. We found that Spanish-language COVID-19 outreach might have been particularly effective for workers who reported high stress from English-language communication (p = 0.001). Moreover, our findings point to the importance of worker and human rights to mitigate the high-stress foreign-born workers who live in Mexico and the US experience.

Scaling a Community-Wide Campaign Intervention to Manage Hypertension and Weight Loss

Public health impacts can be achieved when evidence-based interventions are implemented to those most in need. Too often implementation never or slowly occurs. The community-wide campaign intervention Tu Salud ¡Si Cuenta! has evidence of improving health outcomes related to chronic disease among low-income, Latinos. Using the RE-AIM Framework, this study examined if the scaled-up version of the intervention is associated with improvements in hypertension and obesity in 12 locations. Each element of the RE-AIM framework was examined. For "Effectiveness," we examined outcomes overall and by implementing location. We used linear and logistic regression to assess if exposure in the intervention was associated with improvement in hypertension and weight loss. Participants were stratified into "low exposure" (2-3 outreach visits) vs. "high exposure" (4-5 outreach visits). Based on the RE-AIM Framework, the intervention "reached" its intended population of low-income Latinos, demonstrated "effectiveness" in improving hypertension and obesity, was "adopted" at a high level in all but one site, was "implemented" with fidelity to the intervention model with moderate success across locations, and showed high "maintenance" over time. For effectiveness specifically, we found that out of 5,019 participants, 2,508 (50%) had a baseline hypertensive blood pressure (BP) reading. Of the 2,508, 1,245 (49.9%) recovered to normal blood pressure or pre-hypertension stage by last follow-up. After adjusting for baseline BP and potential confounders in multivariable linear regression models, the high exposure group had significantly more reduction in systolic BP (adjusted mean difference in % change = -0.96; p = 0.002) and diastolic BP (adjusted mean difference in % change = -1.61; p < 0.0001) compared to the low exposure group. After controlling for baseline weight and other confounders, the high exposure group had significantly greater decrease in weight compared to the low exposure group (adjusted mean difference in % change = -1.28; p < 0.0001). Results from the multivariable logistic regression models indicated that compared to the low exposure group the high exposure group was more likely to achieve a clinically significant minimum 5% weight loss [adjusted odds ratio (OR) = 2.97; p < 0.0001). This study contributes evidence that a Community-Wide Campaign model holds promise for addressing hypertension and obesity among low-income Latinos.

Challenges for Latina Breast Cancer Patient Survivorship Care in a Rural US-Mexico Border Region

Rural US Latina breast cancer patients experience language barriers, health literacy issues, and limited access to health care resources that negatively impact survivorship care. This study explored the challenges to survivorship care for rural Latina breast cancer (BC) patients and approaches to supporting survivorship care plans (SCP) from the stakeholders’ perspectives. Data were collected via eight focus groups (n = 40) and individual interviews (n = 4) with Latina BC patients, family caregivers, and health care professionals in a rural US-Mexico Border region. Interviews were audio-taped, transcribed, translated, and analyzed using thematic analysis. Themes related to the patient’s SCP challenges included: (1) lack of knowledge of treatment information, (2) lack of proactive health behavior, (3) gaps in information for care coordination, (4) psychological distress, and (5) difficulty retaining health information. Respondents expressed that the SCP document could fill patient information gaps as well as support patient communication with their clinicians and family. Rural BC patients demonstrated an acute need for information and active engagement in their survivorship care. The findings indicate the importance of addressing challenges for survivorship care on multiple dimensions: Cognitive, behavioral, social, and structural. Developing a culturally tailored SCP intervention will be imperative to support survivorship care.

Diversity of rickettsiae in domestic, synanthropic, and sylvatic mammals and their ectoparasites in a spotted fever-epidemic region at the western US-Mexico border

Over one hundred cases of human rickettsiosis, many fatal, are reported annually across the US-Mexico transboundary region, representing a likely undercount. Although cases are often attributed to Rickettsia rickettsii, the agent of Rocky Mountain spotted fever, multiple other Rickettsia pathogens are present in North America. We conducted multiple-host surveillance of domestic, synanthropic, and sylvatic mammals and their ectoparasites to investigate the ecology of Rickettsia species in this region. A total of 499 mammals, including 83 dogs, 23 wild carnivores, five lagomorphs, and 388 rodents were sampled, and 413 fleas and 447 ticks belonging to 15 and 4 species, respectively, were collected during 2017 and 2018. We detected Rickettsia spp. DNA in one blood sample of coyote (Canis latrans), 11 ear tissues of rodents (10.6%), and 79 ectoparasites (9.5%). Of the 64 Rickettsia-positive fleas, 54 were Echidnophaga gallinacea and 10 were Pulex simulans, while of the 15 ticks, 11 were Rhipicephalus sanguineus s.l. and four Ixodes pacificus. The DNA sequence alignment of gltA and ompB regions revealed one and ten genetic variants of Rickettsia spp., respectively. These variants were clustered in clades of zoonotic species (R. felis, R. massiliae, R. parkeri, R. rickettsii, and R. typhi) and organisms of unknown pathogenic significance (R. asembonensis and Candidatus Rickettsia tarasevichiae). The finding of a coyote infected with R. rickettsii and the multiple zoonotic SFG rickettsial agents in the study area suggest that: 1) wild canids could serve as an amplifying host for RMSF, an alternate host for Rh. sanguineus s.l. ticks, and a means to spread infection and ticks over large areas; and 2) at least some of the human rickettsiosis cases attributed to R. rickettsii could be caused by other Rickettsia species. This study strongly supports the importance of multiple-host and vector eco-epidemiological studies and the One Health approach to better understand disease in a RMSF-epidemic region.

"We go to Tijuana to double check everything": The contemporaneous use of health services in the U.S. and Mexico by Mexican immigrants in a border region

Research in 2009 showed that hundreds of thousands of Mexican immigrants in the U.S. return to Mexico for healthcare annually. Existing studies on the cross-border healthcare behaviors of this group are dominated by two related questions: 1) Why do Mexican immigrants go to Mexico for care? and 2) What are individual-level predictors of seeking care in Mexico? While this research has identified people's motivations for crossing the border for care and key characteristics associated with this behavior, it has underemphasized an important feature of cross-border healthcare seeking, namely that some immigrants contemporaneously use healthcare in the U.S. and Mexico. Drawing on qualitative interviews with Mexican immigrants in San Diego, CA, located on the U.S.-Mexico border, I show that for some, seeking care in Mexico is a way to supplement the care they receive in the U.S. In this region, some people combine care in the two countries in attempts to achieve what they believe to be optimal care results. Their cross-border behaviors include seeking care in the U.S. for a health condition and, if dissatisfied, going to Mexico for care; getting care in the U.S for certain health problems and Mexico for others; going to Mexico for specialist care when their U.S. doctors will not refer them to specialists; and going to Mexico for pharmaceuticals their U.S. doctors will not prescribe. For these individuals, proximity to the border changes the meanings and behaviors associated with being a patient, in that it enables them to be more actively engaged in their care. At the same time, findings raise questions about the quality of care that results from mixing care in the two countries. These findings suggest a need to understand cross-border healthcare seeking among some border residents as embedded in a larger repertoire of healthcare practices.

A Disparity beneath a Paradox: Cancer Mortality among Young Hispanic Americans in the US-Mexico Border Region

The age-adjusted mortality rate for cancer in the US Hispanic population is two thirds that of the non-Hispanic white population, probably because of differences in smoking rates. We aimed to determine whether Hispanic white (HW) cancer mortality in the US-Mexico Border Region was also lower than that of the non-Hispanic white (NHW) border population, particularly in the younger population less likely to develop smoking-related cancer. We obtained age-adjusted cancer mortality rates from 1999 to 2017 for the 44 border counties, the four US-Mexico border states, and the rest of the US. We obtained cancer incidence rates for 1999-2016 from state registries. We stratified rates by age group, ethnicity, border state, urbanization, and cancer site. Age-adjusted border cancer mortality rates were 139.1/100,000 in the HW and 171.4 in the NHW populations, a ratio of 0.8. HW mortality rates were higher than NHW rates only for the 0-34 age group. State-specific HW cancer incidence rates for people 0-34 years old were 77%-80% of NHW rates. We also calculated mortality-incidence ratios (MIR) for the 0-34 population. Border mortality-incidence ratios were higher in the HW population. HW rates exceeded NHW rates for all cancer sites except skin cancer. The HW cancer disparity is due to poorer survival in the HW population, which might be due to limited access to prevention and treatment in a medically underserved area. Mortality among young border Hispanic residents might be reduced through efforts to improve insurance coverage and increase access to medical providers .

The Body in the Mirror: Breast Cancer, Liminality and Borderlands

Breast cancer is the most common cancer among women worldwide, and has a high mortality rate in northern Mexico. Its high rates present one of the principal health challenges of the California-Baja California border region. We employed "entangled" ethnography and interpretative phenomenological methods to explore breast cancer experiences among a group of Mexican immigrant women living on the US side of this border. We explore their trajectory from biographical disruption to biographical renewal. The entangled ethnographic approach includes reflections of the first author's experience as a genetic breast cancer survivor.

Health-Related Quality of Life and Health Literacy among Mexican American and Black American Youth in a Southern Border State

Among adults, health literacy and health-related quality of life are highly correlated constructs that are associated with tangible health outcomes. While the connection between these concepts and health outcomes among youth is still unclear, studying these factors among at-risk adolescent populations can provide researchers, policy-creators, and educators a quantifiable summary of the challenge they face in their efforts to reduce health disparities. The purpose of this study was to better understand the health of minority youth living in a Southern state near the US-Mexico border. Specifically, we sought to describe their health literacy and health-related quality of life, and identify how those concepts may be interrelated. Results indicated that our sample of primarily Mexican American and Black American youth living along the US-Mexico border may be struggling more than other known high-risk groups in terms of health literacy and health-related quality of life. Practical implications for families, schools, and border communities are discussed.

Attitudes toward tobacco among low-income Hispanic adolescents: Implications for prevention

Background: Although US cigarette smoking rates have steadily declined, the changing nature of nicotine consumption and the popularity of non-combustible nicotine products urges us to revise tobacco prevention strategies. Research on smoking perspectives among Hispanic youth is limited yet crucial for prevention efforts with Hispanics being the largest minority in the U.S.Objective: This study sought to understand the experience and perceptions of low-income Hispanic youth regarding tobacco use.Methods: Forty-nine adolescents (ages 9 to 19) from El Paso, Texas, participated in five extended focus group discussions about tobacco/nicotine use.Results: Adolescents were predominantly exposed to tobacco through relatives, although school and party contexts became more relevant as youth aged. Youth had negative perceptions of tobacco and smokers, but believed their peers often viewed tobacco positively. Youth also saw tobacco use as a functional stress-management strategy, especially within their extended family. Health and family were strong motivators not to smoke.Conclusions: Youth maintain several tensions in their views on tobacco. Tobacco use is considered unpleasant and harmful, yet youth perceive their peers to view it as cool. Peer to peer discussion of tobacco experiences and perceptions may help correct these incongruent viewpoints. Adding to this tension is the perception that tobacco is used to manage stress. Given the importance of the home environment for Hispanic youth, tobacco prevention efforts may benefit from engaging family to identify the ways in which tobacco use causes stress.

Binational cancer patient experiences and cancer coping in a rural US-Mexico border region

Objective: Coping with cancer is central to patients' cancer recovery and quality of life, yet little is known about cancer experiences and coping from the perspective of binational cancer patients. This brief report provides an exploration of experiences relating to cancer diagnosis/treatment and coping among Latino cancer patients living in the U.S.-Mexico border regionDesign: We conducted secondary data analysis of qualitative dataParticipants and methods: We conducted in-depth of interviews with 22 patients from a rural cancer care organization. Thematic analysis was used to analyze the data.Findings: Three themes emerged: 1) changes in sexual functioning, 2) navigating cancer in the U.S. and between Mexican border communities, and 3) social support.Conclusion: Rural Latino cancer patients face multiple challenges in accessing cancer treatments. Social support fills the gaps for their continuum of care.Implication: Promoting culturally-relevant coping and resilience in clinical practice.

Substance Use among Female Sex Workers in Two US-Mexico Border Cities: Associations with Age of Entry

BACKGROUND

Research has documented consistent associations between entry into sex work as a minor and sexual HIV risk. However, previous studies have not examined whether substance use and related HIV risk are elevated among those who enter sex work under age 18.

METHODS

Quantitative data were collected via time-location sampling of 603 female sex workers (FSWs) ages 18 years and older residing in two Mexico-US border cities. Age of entry into sex work (categorized as 15 years or younger, 16-17 years, or 18 years and older) was assessed as a predictor of substance use (forced and voluntary) within the first month post-entry and recent (past 30 days) substance use with clients.

RESULTS

Compared to those who entered as adults, participants who entered sex work at age 15 or younger were significantly more likely to report drug use (AOR = 5.2, CI = 2.9-8.9) and forced drug use within the first 30 days of entry (AOR= 6.0, CI = 1.9-18.9), as well as past month drug use with clients (AOR= 3.4, CI = 1.9-5.8). Similar results were found among participants who entered sex work at age 16-17.

CONCLUSIONS

Increased risk of recent substance use with clients indicates continuing elevated risk for those entering sex work at these early ages. Early and forced substance use at entry may underlie the elevated risk of HIV infection consistently observed among this population.

Influenza vaccination coverage among US-Mexico land border crossers: 2009 H1N1 pandemic and 2011-2012 influenza season

BACKGROUND

The high volume of US-Mexico land border crossings can facilitate international dissemination of influenza viruses.

METHODS

We surveyed adult pedestrians crossing into the United States at two international land ports of entry to assess vaccination coverage during the 2009H1N1 influenza pandemic and 2011-2012 influenza season.

RESULTS

Of 559 participants in 2010, 23.4% reported receipt of the 2009H1N1 vaccine. Of 1423 participants in 2012, 33.7% received the 2011-2012 influenza vaccine. Both years, those crossing the border ≥8 times per month had lower vaccination coverage than those crossing less frequently. US-border residents had lower H1N1 coverage than those in other locations. Vaccination coverage was higher for persons age ≥65 years and, in 2010 only, those with less than high school education. Although most participants believed it is important to get vaccinated, only half believed the influenza vaccine was safe and effective. The main reasons for not receiving the influenza vaccine were beliefs of low risk of disease, time constraints, and concerns about vaccine safety (in 2010) or efficacy (in 2012).

CONCLUSIONS

International land border crossers are a large and unique category of travelers that require targeted binational strategies for influenza vaccination and education.

Mortality, Ethnicity, and Urbanization Among Children Aged 1-4 Years on the US-Mexico Border

OBJECTIVES

Little is known about the mortality of children along the US-Mexico border. The objective of our study was to determine whether mortality rates among Hispanic children along the border ("border Hispanic children") exceeded mortality rates among non-Hispanic white children along the border.

METHODS

We examined mortality rates from 2001-2015 for children aged 1-4 years in US-Mexico border counties and in the United States overall. We compared mortality rates among Hispanic and non-Hispanic white children by county urbanization level (large central, medium, and small metropolitan; micropolitan nonmetropolitan; and noncore nonmetropolitan).

RESULTS

During 2001-2015, 1811 children aged 1-4 years died in the border region. The mortality rate per 100 000 children among border Hispanic children (28.3; 95% confidence interval [CI], 26.8-29.9) exceeded the mortality rate of US Hispanic children (24.7; 95% CI, 24.3-25.1) and border non-Hispanic white children (23.2; 95% CI, 20.8-25.6). When stratified by county urbanization level, however, mortality rates of border Hispanic children were not significantly different from mortality rates of US Hispanic or border non-Hispanic white children. Mortality rates in noncore nonmetropolitan counties were twice those in large central metropolitan counties, with injury mortality accounting for most of the excess. Mortality rates increased in nonmetropolitan border counties after 2010.

CONCLUSIONS

Increased risk for injury and disease in noncore nonmetropolitan counties might be related to poverty, reduced access to care, or poorer quality of care. Future research should identify the remediable risk factors in such communities as the next step in preventing deaths among children aged 1-4 years.

Efficacy of Cancer Care Communication Between Clinicians and Latino Patients in a Rural US-Mexico Border Region: a Qualitative Study of Barriers and Facilitators to Better Communication

Quality of clinician-patient cancer communication is vital to cancer care and survivorship. Racial/ethnic minority patients in rural regions may have unique characteristics including cultural beliefs, language barriers, and low health literacy which require effective cross-cultural cancer communication. Despite the growing US population of racial/ethnic minorities and widespread emphasis on culturally appropriate health communication, little is known about challenges and facilitators of cancer communication among underserved rural Latino cancer patients in the US-Mexico border region. This study conducted secondary data analysis of interview data collected from 22 individual cancer patients living on the US side of the US-Mexico border. Thematic analysis was conducted to explore a priori questions regarding patient experiences with cancer care communication with their providers. Emerging themes included lack of language concordance, patient perspectives on clarity and accuracy of information provided, patient perceptions on provider sensitivity in giving cancer diagnosis, and improving the clinical interpersonal relationship. Practice guidelines are suggested and discussed. These findings illuminate the importance of advancing improvement of cancer communication between clinicians and Spanish language-dominant Latinos.

Placental biomarkers of PAH exposure and glutathione-S-transferase biotransformation enzymes in an obstetric population from Tijuana, Baja California, Mexico

Environmental exposures along the US-Mexico border have the potential to adversely affect the maternal-fetal environment. The purpose of this study was to assess placental biomarkers of environmental exposures in an obstetric population at the California-Baja California border in relation to detoxifying enzymes in the placenta and nutritional status. This study was conducted on consenting, full-term, obstetric patients (n=54), delivering in a hospital in Tijuana, Baja California (BC), Mexico. Placental polyaromatic hydrocarbon (PAH)-DNA adducts were measured in addition to placental glutathione-S-transferase (GST) activity and genotype, maternal serum folate, and maternal and umbilical cord blood lead and cadmium levels. A questionnaire was administered to the mothers to determine maternal occupation in a maquiladora, other exposures, and obstetric indicators. In univariate analysis, maternal serum folate levels were inversely correlated with total PAH-DNA adducts (rho=-0.375, p=0.007); adduct #1 (rho=-0.388, p=0.005); and adduct #3 (rho =-0.430, p=0.002). Maternal lead levels were significantly positively correlated with cord blood lead levels (rho=0.512, p<0.001). Cadmium levels were generally very low but significantly higher in mothers exposed to environmental tobacco smoke (ETS) (either at work or at home, n=10). In multivariate analysis, only maternal serum folate levels remained as a significant negative predictor of total DNA-PAH adducts levels in placenta. These findings affirm that placental tissue is a valuable and readily available source of human tissue for biomonitoring; and indicate that further study of the role of nutrition in detoxification and mitigation of environmental exposures in pregnant women is warranted.

Performance of the Quidel Sofia rapid influenza diagnostic test during the 2012-2013 and 2013-2014 influenza seasons

The Quidel Sofia Influenza A+B Fluorescent Immunoassay was used to test nasal swab specimens from patients with influenza‐like illness at US–Mexico border‐area clinics in the 2012–2013 and 2013–2014 influenza seasons. Compared with real‐time reverse transcription polymerase chain reaction, the overall sensitivities and specificities were 83% and 81%, and 62% and 93%, respectively.

Tu Salud, ¡Si Cuenta!: Exposure to a community-wide campaign and its associations with physical activity and fruit and vegetable consumption among individuals of Mexican descent

Mexican Americans along the US-Mexico border have been found to be disproportionately affected by chronic diseases particularly related to lack of physical activity and healthful food choices. A community-wide campaign (CWC) is an evidence-based strategy to address these behaviors but with few examples of implementation in Mexican descent populations facing profound health disparities. We examined exposure to a CWC, titled Tu Salud ¡Sí Cuenta!, and its association with meeting the recommended minutes of moderate and vigorous physical activity weekly and consuming more portions of fruits and vegetables daily. A cross-sectional sample of 1438 Mexican descent participants was drawn from a city-wide, randomly-selected cohort interviewed between the years 2008 and 2012. Multivariable comparisons of participants exposed and not exposed to the CWC and meeting physical activity guidelines or their fruit and vegetable consumptions using mixed effects models were conducted. The community-wide campaign components included different forms of mass media and individually-focused components such as community health worker (CHW) home visits. After adjusting for gender, age, marital status, educational attainment, language preference, health insurance, and diabetes diagnosis, the strongest association was found between meeting physical activity guidelines and exposure to both CHW discussions and radio messages (adjusted OR = 3.83; 95% CI = [1.28, 6.21]; p = 0.0099). Participants who reported exposure to both radio and TV messages consumed more portions of fruits and vegetables than those who reported no exposure (adjusted RR = 1.30; 95% CI = [1.02, 1.66]; p = 0.0338). This study provides insights into the implementation and behavioral outcomes associated with exposure to a community-wide campaign, a potential model for addressing lifestyle modifications in populations affected by health disparities.

Hispanic Use of Juramentos and Roman Catholic Priests as Auxiliaries to Abstaining from Alcohol Use/Misuse

This self-administered mail survey study conducted along the US-Mexico border replicates and expands on research conducted in Florida regarding the prevalence of juramento use as an intervention technique for alcohol misuse. Juramentos are pledges to abstain from alcohol use for a time determined by the user. The pledge is usually to the Virgin of Guadalupe and is often done in the presence of a Roman Catholic Priest. As in Florida, the majority of Priests along the border reported they were familiar with the practice of juramentos and had already witnessed at least one. The majority of Priests who had done juramentos viewed them as effective. Since the vast majority of Priest indicated that they would begin or continue witnessing juramentos, this makes juramentos and Roman Catholic Priests a viable culturally sensitive aide for treatment among Hispanics, in particular those of Mexican descent.

Modeling particle number concentrations along Interstate 10 in El Paso, Texas

Annual average daily particle number concentrations around a highway were estimated with an atmospheric dispersion model and a land use regression model. The dispersion model was used to estimate particle concentrations along Interstate 10 at 98 locations within El Paso, Texas. This model employed annual averaged wind speed and annual average daily traffic counts as inputs. A land use regression model with vehicle kilometers traveled as the predictor variable was used to estimate local background concentrations away from the highway to adjust the near-highway concentration estimates. Estimated particle number concentrations ranged between 9.8 × 103 particles/cc and 1.3 × 105 particles/cc, and averaged 2.5 × 104 particles/cc (SE 421.0). Estimates were compared against values measured at seven sites located along I10 throughout the region. The average fractional error was 6% and ranged between -1% and -13% across sites. The largest bias of -13% was observed at a semi-rural site where traffic was lowest. The average bias amongst urban sites was 5%. The accuracy of the estimates depended primarily on the emission factor and the adjustment to local background conditions. An emission factor of 1.63 × 1014 particles/veh-km was based on a value proposed in the literature and adjusted with local measurements. The integration of the two modeling techniques ensured that the particle number concentrations estimates captured the impact of traffic along both the highway and arterial roadways. The performance and economical aspects of the two modeling techniques used in this study shows that producing particle concentration surfaces along major roadways would be feasible in urban regions where traffic and meteorological data are readily available.

Healthcare provider perspectives on barriers to HIV-care access and utilisation among Latinos living with HIV in the US-Mexico border

Latinos living with HIV residing in the US-Mexico border region frequently seek care on both sides of the border. Given this fact, a border health perspective to understanding barriers to care is imperative to improve patient health outcomes. This qualitative study describes and compares experiences and perceptions of Mexican and US HIV care providers regarding barriers to HIV care access for Latino patients living in the US-Mexico border region. In 2010, we conducted in-depth qualitative interviews with HIV care providers in Tijuana (n = 10) and San Diego (n = 9). We identified important similarities and differences between Mexican and US healthcare provider perspectives on HIV care access and barriers to service utilisation. Similarities included the fact that HIV-positive Latino patients struggle with access to ART medication, mental health illness, substance abuse and HIV-related stigma. Differences included Mexican provider perceptions of medication shortages and US providers feeling that insurance gaps influenced medication access. Differences and similarities have important implications for cross-border efforts to coordinate health services for patients who seek care in both countries.

Mexican Pharmacies and Antibiotic Consumption at the US-Mexico Border

OBJECTIVE

To study antibiotic dispensing to US and Mexican residents, at Mexican pharmacies at the US-Mexico border, and the pharmacy clerks' capability to promote appropriate use.

METHODS

The site selected was Ciudad Juarez, Chihuahua (pop. 1.2 million) separated from El Paso, Texas (pop. 800,000) by the Rio Grande River. A convenience sample of 32 pharmacies located near the international bridges, major shopping centers, and interior neighborhoods was selected. Pharmacy clients were interviewed (n=230) and 152 interactions between clients and pharmacy clerks were observed. Information was obtained about education and pharmaceutical training of 113 clerks working in 25 pharmacies. A senior pharmacy clerk in each of the 25 pharmacies was interviewed and asked for their recommendations to clients presenting two clinical scenarios and seven diagnoses.

FINDINGS

Professionally trained pharmacists only spend a few hours a week in some pharmacies. Clerks' education levels are very low; some have only completed primary education. There is no required pharmaceutical training and their knowledge about pharmaceuticals comes mostly from representatives of the pharmaceutical industry. Clerks' knowledge of antibiotics, the most frequently sold class of medicines (65% without prescription), is very limited. Clients trust pharmacy clerks and tend to follow their advice.

CONCLUSIONS

The findings raise concerns about dispensing of antibiotics at Mexican border pharmacies and antibiotic overuse due to lack of control. Because inappropriate antibiotic use contributes to increased resistance, pharmacy clerks should receive independent training to dispense antibiotics and promote their appropriate use.