Toan Ha

Dr. Toan Ha

University of Pittsburgh, Pittsburgh, Pennsylvania, USA
orcid

Research Focus & Metrics

Academic Career Length

17Years (2010-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 January 2010 in Harm Reduction Journal
Verified
Journal Article
Open access
PDF file
JLJianhua Li
Jianhua Li
Toan HaToan Ha
Toan Ha
CZCunmin Zhang
Cunmin Zhang
HLHongjie Liu
Hongjie Liu
Illicit drug use has become popular in China. Acknowledging the challenge of illicit drug use, China has adopted several new policies on the management of illicit drug use in recent years. This study reviews the current policies on drug use and assesses the harm reduction interventions among drug users in China. The review documents that the new policies on drug use provide a variety of choices of detoxification treatment for drug users. The methadone maintenance treatment and needle exchange programs have been adopted as harm reduction models in China. Most of the reviewed harm reduction programs have been successfully implemented and yielded positive effects in reducing drug related risk behaviors among drug users. Although there remain barriers to the effective implementation of policies on drug use and harm reduction programs, Chinese government has shown their commitment to support the expansion of harm reduction interventions for drug users throughout the country.

3 December 2021 in npj Clean Water
Verified
Journal Article
Open access
PDF file
PVPenny Vlahos
Penny Vlahos
SSStephen L. Schensul
Stephen L. Schensul
SAShuchi Anand
Shuchi Anand
ESEmma Shipley
Emma Shipley
Saranga DiyabalanageSaranga Diyabalanage
Saranga Diyabalanage
NNNishantha Nanayakkara
Nishantha Nanayakkara
A chronic Kidney Disease of unknown etiology (CKDu) has emerged with disproportionately high prevalence across dry lowland agricultural communities globally. Here we present the results of a prospective cohort of 293 patients with CKDu in the endemic region of Wilgamuwa, Sri Lanka, in whom we measured baseline kidney function and undertook quarterly follow up over 2 years. Well water was the primary historic drinking water source in the region, although a majority (68%) of participants reported switching to reverse osmosis water during study follow ups. Participants who reported ever drinking from well water had estimated glomerular filtration rates −6.7 (SD: 2.8) ml/min/1.73 m2 lower than participants who did not drink from well water historically (p = 0.0184) during the study period. Geospatial analysis identifies a cluster within the region where CKDu progression is significantly higher than the surrounding area. Samples of household wells (n = 262) indicated 68% had detectable agrochemical compounds with concentration above global water quality standards. It is expected that the detected contaminants compounds are indicators of poor water quality and that there is likely additional agrochemical exposure including commercial additives that may contribute to CKDu onset and/or progression. Thus, our study finds that well water exposure during a person’s lifetime in this region is associated with kidney function decline and identifies and quantifies putative nephrotoxic agrochemicals above safe drinking water concentrations in these wells.

28 November 2013 in PLOS ONE
Verified
Journal Article
Open access
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ANAnh D. Ngo
Anh D. Ngo
Toan HaToan Ha
Toan Ha
JRJohn Rule
John Rule
CDChinh V. Dang
Chinh V. Dang
This paper reports changes in behavioral outcomes related to the use of HIV testing service of a project that employed peer-based education strategies and integration of HIV voluntary counseling and testing (VCT) and Sexual and Reproductive Health (SRH) services targeting young people aged 15–24 across 5 provinces in Vietnam. A pre-test/post-test, non-experimental evaluation design was used. Data were collected from cross-sectional surveys of youth and client exit interviews at project supported SRH clinics conducted at baseline and again at 24 months following implementation. The baseline samples consisted of 813 youth and 399 exit clients. The end line samples included 501 youths and 399 exit clients. Z test was used to assess changes in behavioral outcomes. Results show that there was a significant increase (p<0.05) in the percentage of youth who wanted to obtain a HIV test (from 33% to 51%), who had ever had a test (from 7.5% to 15%), and who had a repeat test in the last 12 months (from 54.5% to 67.5%). Exit client interviews found a nearly five-fold increase in the percentage of clients seeking HIV VCT in their current visit (5.0% vs. 24.5%) and almost two-fold increase in the percentage of those having their last test at a project supported clinic (9.3% vs. 17.8%). There were also positive changes in some aspects of youth HIV/AIDS knowledge, attitudes, and risk perceptions. This study provides preliminary evidence regarding the benefits of the integration of HIV VCT-SRH services in terms of increased access to HIV services and testing in Vietnam. Benefits of peer-based education regarding increased HIV knowledge were also identified. Further investigations, including experimental studies with assessment of health outcomes and the uptake of HIV testing services, are required to better elucidate the effectiveness and challenges of this intervention model in Vietnam.

3 February 2023 in Journal of Community Health
Verified
Journal Article
Closed access
PDF file
KPKiran Paudel
Kiran Paudel
SGSana Gupta
Sana Gupta
KGKamal Gautam
Kamal Gautam
JWJeffrey A Wickersham
Jeffrey A Wickersham
AKAntoine Khati
Antoine Khati
Roman ShresthaRoman Shrestha
Roman Shrestha

Toan HaToan Ha
Toan Ha
DGDavid Givens
David Givens
TNTrang Nguyen
Trang Nguyen
NNNam Nguyen
Nam Nguyen
Despite intensive HIV education and prevention efforts in the past few years, stigmatizing attitudes toward people living with HIV (PLWH) remain a major barrier to HIV prevention and treatment efforts in Vietnam. The purpose of this study was to examine the prevalence of stigmatizing attitudes regarding HIV and identify correlative factors that impact the perceptions of PLWH among a heretofore overlooked demographic in Vietnamese society: women who are migrant workers in designated industrial zones (IZs). A cross-sectional study was conducted among 1061 women migrant workers aged 18 to 29 from January 2020 to November 2020 in Hanoi, Vietnam. Stigmatizing attitudes toward PLWH were measured using a four-item scale. Multiple logistic regression was conducted to examine the factors associated with stigmatizing attitudes. Our findings indicate both substantial levels of stigma persisting among this demographic group as well as the influence of important mitigating factors on the expression of HIV-related stigma. Over seventy-six percent (76.2%) of the participants reported having at least one of the four stigmatizing attitudes. Greater levels of stigmatizing attitudes toward PLWH were significantly associated with lower HIV knowledge, lower levels of education, and identifying as Kinh (the ethnic majority in Vietnam). Additionally, this study found that questions framing HIV infection through a familial lens were significantly associated with lower rates of stigmatizing responses. The high overall levels of stigmatizing attitudes toward PLWH among the study participants suggests that there is an urgent need for the development of culturally appropriate interventions and outreach education activities to reduce stigmatizing attitudes toward PLWH among women who are migrant workers working in the IZs in Vietnam. This study adds to both the existing literature and current efforts and policies around HIV in Vietnam by empirically suggesting that familial-based messaging may be a powerful potential narrative for interventions addressing HIV-related issues such as stigma.

3 December 2021 in Frontiers in Reproductive Health
Verified
Journal Article
Open access
Toan HaToan Ha
Toan Ha
SSStephen L. Schensul
Stephen L. Schensul
JSJean J. Schensul
Jean J. Schensul
TNTrang Nguyen
Trang Nguyen
NNNam Nguyen
Nam Nguyen
Background: Young migrant workers working in the industrial zones (IZ) in low and middle-income countries are at risk for HIV and other sexually transmitted diseases. This study examines the sex-related risks of young women migrant workers in the IZ in Vietnam.Materials and Methods: This cross-sectional survey was conducted among 1,061 young migrant women working in the IZ park in Hanoi, Vietnam. Multivariate logistic regression analysis was used to identify factors associated with HIV testing and condom use at last sex.Results: A total of 1,061 young women migrant workers completed the survey in which 652 participants consented to take the initial rapid HIV test. All but one participant tested negative indicating a HIV prevalence of 150 (95% CI: 27–860) per 100,000 population among this population. There were no differences in sexual behavior, use of sexual and reproductive health services, HIV knowledge, perceived HIV risk or alcohol use between those who were HIV tested and those not tested. Single participants reported high rates of first sex while living in the IZ and high rates of condom use during the first-time sex, however, they had low levels of condom use at last sex. While the majority of married participants used the SRH/HIV services, nearly 80% of the single participants who reported having sex never used SRH/HIV services since living in the IZ. However, single participants were over 4 times more likely to use condoms at last sex compared to married participants (OR = 4.67; 95%CI = 2.96–7.85). Participants with vocational school or higher education was more likely to use condom (OR = 2.19; 95%CI = 1.05–4.57). Neither HIV knowledge or alcohol use were associated with condom use.Conclusions: Although HIV prevalence is very low among young women workers in the IZ in Vietnam, a significant number of them engaged in risky sexual behavior and low levels of condom use at last sex as well as low level of using SRH/HIV services highlights a need to develop interventions that provide tailored-made and cultural appropriate SRH education for unmarried female migrant workers to prevent risky sexual behaviors, sexually transmitted diseases and unwanted pregnancy.