Comorbidities of diabetes and hypertension in Vietnam: current burden, trends over time, and correlated factors.

BACKGROUND: Vietnam conducted the national Noncommunicable Disease Risk-Factor Surveillance (STEPs) surveys in the years 2010, 2015, and 2021. This study aims to use STEPs data to assess the burden of comorbidity between diabetes and hypertension, analyze trends over time, and identify factors associated with this comorbidity. METHODS: The study extracted data for the population aged 25-64 years old from three STEPs surveys. Survey weight was used for all estimations of prevalence and 95% CI. Correlated factors with comorbidity were examined by a multivariate logistics model. RESULTS: The prevalence of comorbidity in 2021 was about 3.92% among Vietnamese people aged 25-64. In the last 10 years, this prevalence has increased more than 8 times (from 0.44% to 3.92%). Sub-populations demonstrating the most significant changes included the male population, people living in urban areas, and older people. Significant factors correlated with comorbidity included demographic factors, body mass index (BMI), and clustering of 4 noncommunicable diseases (NCDs) behavioral risk factors (OR = 3.48, p < 0.05). CONCLUSION: The high comorbidity between hypertension and diabetes underscores the imperative for integrated treatment and management approaches in Vietnam. Coordinated care is essential for addressing the complex interplay between these two prevalent conditions.

Food insecurity and brain health in adults: A systematic review.

Food insecurity has been associated with adverse effects on physical health and well-being in both high and low-income countries, but effects on brain health are not clear. The purpose of this systematic review was to determine the relationship between food insecurity and important brain health outcomes in adults including depression, stroke, cognitive impairment and dementia. Electronic databases were searched to find studies which investigated relations between food insecurity and predefined brain health outcomes. Thirty studies met the inclusion criteria for review of which 23 were conducted in high income countries and seven in low- or middle-income countries. Most studies (n = 24) were cross-sectional, five were prospective and 1 was a case-control design. Seven studies reporting outcomes relating to cognitive performance and 24 relating to depression. No studies investigated relations between food insecurity and stroke or dementia. There was substantial heterogeneity in the populations studied as well as measures of food insecurity and outcomes which made comparisons between studies difficult. Overall, the findings highlighted that individuals who were food insecure had increased likelihood of depressive symptoms and poorer global cognition than those who were food secure. It is possible that social support and food aid programmes attenuate the effects of food insecurity on depressive symptoms. Future research is needed to determine whether interventions to alleviate food insecurity can benefit brain health in vulnerable populations.

Reference data among general population and known-groups validity among hypertensive population of the EQ-5D-5L in Vietnam.

PURPOSE: This study aims to provide EQ-5D-5L population norms among the general population in Vietnam and to test EQ-5D-5L' construction validity among people living with hypertension there. METHODS: Descriptive statistics of the five dimensions and five levels, EQ-VAS and EQ-5D-5L indexes were categorised into gender and age groups for the EQ-5D-5L population norms. Known-groups testing was set for lower EQ-5D-5L outcomes among people who were aware of their hypertensive status, females, people with more comorbidities, less education, older ages, and higher body mass indexes. Level of confident interval was 95%. RESULTS: The mean EQ-VAS and EQ-5D-5L indexes were 81.10 (SD: 13.35) and 0.94 (SD: 0.09) among the general population. The EQ-5D-5L outcomes were better among younger people, males, people with more education, employees, and single people. Respondents reported fewer problems with self-care and usual activities and tend to have problems at higher levels across older ages. The known-group testing showed statistically significant results. The mean EQ-VAS and EQ-5D-5L indexes of people in the diagnosed hypertensive group (71.48 and 0.94, respectively) were statistically significantly smaller than they were in the non-hypertensive and undiagnosed hypertensive group (76.65 and 0.97; 76.95 and 0.96 accordingly). Statistically significant associations of lower EQ-5D-5L indexes and EQ-VAS were found among people diagnosed for hypertension, people suffering from an incremental comorbidity, and obese people. CONCLUSION: This study has provided EQ-5D-5L population norms for the general population and evidence for known-groups validity of the EQ-5D-5L instrument among hypertensive people in Vietnam.

An EQ-5D-5L Value Set for Vietnam.

PURPOSE: The objective of this study was to develop an EQ-5D-5L value set based on the health preferences of the general adult population of Vietnam. METHODS: The EQ-VT protocol version 2.1 was applied. Multi-stage stratified cluster sampling was employed to recruit a nationally representative sample. Both composite time trade-off (C-TTO) and discrete choice experiment (DCE) methods were used. Several modelling approaches were considered including hybrid; tobit; panel and heteroscedastic models. First, models using C-TTO or DCE data were tested separately. Then possibility of combining the C-TTO and DCE data was examined. Hybrid models were tested if it was sensible to combine both types of data. The best-performing model was selected based on both the consistency of the results produced and the degree to which models used all the available data. RESULTS: Data from 1200 respondents representing the general Vietnamese adult population were included in the analyses. Only the DCE Logit model and the regular Hybrid model that uses all available data produced consistent results. As the priority was to use all available data if possible, the hybrid model was selected to generate the Vietnamese value set. Mobility had the largest effect on health state values, followed by pain/discomfort, usual activities, anxiety/depression and self-care. The Vietnam values ranged from - 0.5115 to 1. CONCLUSION: This is the first value set for EQ-5D-5L based on social preferences obtained from a nationally representative sample in Vietnam. The value set will likely play a key role in economic evaluations and health technology assessments in Vietnam.

Establishing a tobacco control fund in Vietnam: some learnings for other countries.

In response to the need for stable and adequate funding for tobacco control and the shortage of personnel working in the field, the Vietnam Tobacco Control Fund (VNTCF) was established through the Law on Prevention and Control of Tobacco Harms in 2012. In September 2014, VNTCF awarded its first set of grants. Built on the local evidence-based context and needs as well as lessons learnt from other countries, VNTCF adapted best practices with adjustments that fit the country's political, economic and social environment. The key strengths of the VNTCF are the evidence-based model; multisectoral management; clearly dedicated funding mechanism, defined vision, objectives and function; outcomes based mechanism and a multisectoral approach to releasing grants. Although several challenges remain such as insufficient human resources to undertake the workload, complex and cumbersome administrative processes, and limited capacity for tobacco control in the country, VNTCF has achieved several successes. The establishment of VNTCF in Vietnam is a critical milestone within the country's fight against the tobacco epidemic. It showed not only the commitment of the local authorities to the fight but also their determination to ensure sustainable funding for tobacco control activities in Vietnam. Analysing VNTCF's critical success elements, key strengths and challenges is helpful for other countries which want to establish or modify a tobacco control fund.

The roles of, activities of, and competencies for, community nursing services in rural Vietnam: Implications for policy decisions.

Community health workforce plays a vital role in providing primary health care services as per the needs of residents; however, few studies have examined how nurses work within commune health centers (CHCs). Using qualitative methods including interviews and focus group discussions with key stakeholders, this study explores the roles, activities, and competencies required of community nursing services in rural districts within Vietnam. Two primary roles were identified: CHC nursing and family nursing. For the latter, in addition to providing people with general health care and health communication, they were expected to also deliver psychological care. CHC nursing fulfilled more roles and required four specific competencies: clinical care, communication, management, and planning/coordination activities. Despite these various roles serving people within a community, few ongoing efforts at either the local or national level are aimed at supporting these nurses. The study highlights the need for policy decisions via either developing a new job position policy or adapting the existing policy by integrating new roles into the existing positions of CHC nurses in Vietnam.

Secondhand Smoke and Socio-Demographic Associated Factors: Results From the Vietnam Population-Based Provincial Global Adult Tobacco Survey in 2022.

Background: Secondhand smoke (SHS) has detrimental effects on community health, including coronary heart diseases, stroke, lung cancer etc. This manuscript exploited data from the Vietnam Population-based Provincial Global Adult Tobacco Survey (PGATS) in 2022 to update the prevalence of adult exposure to SHS and associated socio-demographic factors. Methods: With the sample size of 71,981 adults aged 15+ throughout 30 provinces and cities in Vietnam, data was collected using the Global Adult Tobacco Survey (GATS) questionnaire. Bivariate analysis and multivariate logistic regression modelling were performed. Results: In the past 30 days, 44.4% (95% CI: 44.0%-44.9%) adults aged 15+ exposed to SHS at home while 23.1% (95% CI: 22.6%-23.6%) exposed to SHS at work. Female exposure to SHS in the past 30 days was higher at homes but lower at indoor workplaces. Participants aged 15-24 were likely to have higher odds of SHS exposure in the past 30 days to other age groups. Those living in the urban areas had 1.15 times higher odds (95% CI: 1.08-1.22) of exposure to SHS than those in the rural areas. Current smokers tended to have 2.2 times higher odds of exposure to SHS at the indoor workplaces compared to non-smokers (95% CI: 2.05-2.37). Conclusions: The prevalence of exposure to SHS at home was still relatively high amongst the adult population. While there was a significant reduction of SHS exposure at indoor workplaces, there was a higher prevalence of women being exposed to SHS at home. The Government of Vietnam should continue to strictly implement the smoke-free environment resolution at indoor workplaces and appropriate communication campaigns to protect people, especially women from SHS exposure at homes.

Ante-, Peri-, and Neonatal Factors Associated with Autism Spectrum Disorders in Vietnam: A Population-Based Cross-Sectional Survey.

Background: Autism Spectrum Disorders (ASDs) are common behavioral syndromes but limited critical evidence in Vietnam. This study aimed to identify ante-, peri- and neonatal factors for ASDs amongst children in Vietnam. Methods: This population-based study applied the cross-sectional design with a multistage sampling in 21 urban and rural districts in seven cities/provinces in Vietnam during 2017-2018. Overall, 42,551 children age 18 to 30 months were enrolled in the study. Two phases of assessment using Modified Checklist for Autism in Toddlers (M-CHAT) for screening and diagnostic assessment using Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) criteria for confirmation. We employed univariate and binary logistic regression to identify. Results: Our study showed a fast-growing trend of ASDs amongst children age 18 and 30 months (75.8 per 10,000 individuals). Nine ante-, peri-, and neonatal factors were associated with ASDs: five factors of antenatal period (history of miscarriage/abortion or stillbirth, children conceived by assisted reproduction technologies, having cold, flu or acquiring virus during pregnancy, having gestational diabetes, toxemia, high blood pressure or pre-eclampsia during pregnancy, and having stress or mental disorders during pregnancy); one factors of perinatal period (mode of delivery); and three factors of neonatal period (jaundice, respiratory distress, and newborn seizures). Conclusion: This first large-scale survey in Vietnam confirms some prenatal, perinatal, and postnatal factors with ASDs amongst children age 18 and 30 months. Future interventions should focus on these factors to early diagnosis and intervention to improve functional outcomes for risky children.

Exposure to second-hand smoke at home and its associated factors: findings from the Global Adult Tobacco Use survey in Vietnam, 2010.

OBJECTIVE: The paper describes the pattern of exposure to second-hand smoke (SHS) at home among the adult population of Vietnam and examines associated socio-demographic factors. METHODS: A total of 11,142 households were selected for this survey using a two-phase sampling design analogous with three-stage stratified cluster sampling. The dependent variable was the status of exposure to SHS at home. Independent variables included gender, age, occupation, asset-based wealth quintile, ethnicity, marital status, residence. Logistic regression modelling was performed to examine the association with relevant factors of patterns of exposure to second-hand smoke among non-smokers. RESULTS: Of adults aged 15 years and above (representing approximately 47 million people) 73.1% reported they were exposed to SHS at home at least monthly. Considering non-smokers only, the prevalence of exposure to SHS at home was 67.6% (equivalent to approximately 33 million non-smokers). The significant correlates of the status of exposure to SHS at home among non-smokers were female gender, ethnic minority, low education, and lack of smoking restriction at home. CONCLUSION: The study showed that a high percentage of people are exposed to second-hand smoke at home. Disadvantaged people were more likely than the better-off to be exposed to SHS at home.

Breast cancer screening practices among Vietnamese women and factors associated with clinical breast examination uptake.

BACKGROUND: This study examined current breast cancer (BC) screening practices among Vietnamese women and the factors associated with the uptake of clinical breast examination (CBE). METHODS: A total of 508 women aged 30-74 years in Hanoi completed a knowledge-attitude-practice (KAP) survey in 2019 including validated measures of breast cancer awareness (Breast-CAM) and health beliefs (Champion's Health Belief Model Scale). Descriptive statistics, χ2, and ANOVA tests were used to analyse KAP responses across groups with different sociodemographic characteristics. A logistic regression model assessed the associations of knowledge, beliefs, and sociodemographic characteristics with CBE uptake. RESULTS: Only 18% of respondents were aware of BC signs, risk factors, and screening modalities although 63% had previously received BC screening. CBE was the most common screening modality with an uptake of 51%. A significantly higher proportion of urban residents compared with rural residents (32% vs 18%, Chi-square test, p = 0.04) received mammography. Unlike mammography, CBE uptake was not associated with sociodemographic characteristics (i.e., residence area/education level/occupation/household monthly income/possession of health insurance). CBE uptake was associated with BC knowledge (OR = 2.44, 95%CI: 1.37-4.32), perceived susceptibility to BC (OR = 1.15, 95%CI: 1.05-1.25), and perceived barriers to accessing CBE (OR = 0.88, 95%CI: 0.84-0.92). CONCLUSION: The study points to the need for public health education and promotion interventions to address low levels of awareness about BC and to increase uptake of BC screening in Vietnam in advance of screening programme planning and implementation. It also suggests that screening programmes using CBE are promising given current engagement and the absence of socio-demographic disparities.

Deep learning models for forecasting dengue fever based on climate data in Vietnam.

BACKGROUND: Dengue fever (DF) represents a significant health burden in Vietnam, which is forecast to worsen under climate change. The development of an early-warning system for DF has been selected as a prioritised health adaptation measure to climate change in Vietnam. OBJECTIVE: This study aimed to develop an accurate DF prediction model in Vietnam using a wide range of meteorological factors as inputs to inform public health responses for outbreak prevention in the context of future climate change. METHODS: Convolutional neural network (CNN), Transformer, long short-term memory (LSTM), and attention-enhanced LSTM (LSTM-ATT) models were compared with traditional machine learning models on weather-based DF forecasting. Models were developed using lagged DF incidence and meteorological variables (measures of temperature, humidity, rainfall, evaporation, and sunshine hours) as inputs for 20 provinces throughout Vietnam. Data from 1997-2013 were used to train models, which were then evaluated using data from 2014-2016 by Root Mean Square Error (RMSE) and Mean Absolute Error (MAE). RESULTS AND DISCUSSION: LSTM-ATT displayed the highest performance, scoring average places of 1.60 for RMSE-based ranking and 1.95 for MAE-based ranking. Notably, it was able to forecast DF incidence better than LSTM in 13 or 14 out of 20 provinces for MAE or RMSE, respectively. Moreover, LSTM-ATT was able to accurately predict DF incidence and outbreak months up to 3 months ahead, though performance dropped slightly compared to short-term forecasts. To the best of our knowledge, this is the first time deep learning methods have been employed for the prediction of both long- and short-term DF incidence and outbreaks in Vietnam using unique, rich meteorological features. CONCLUSION: This study demonstrates the usefulness of deep learning models for meteorological factor-based DF forecasting. LSTM-ATT should be further explored for mitigation strategies against DF and other climate-sensitive diseases in the coming years.

Diagnosis and Treatment of an Undifferentiated Embryonal Sarcoma of the Liver in a 37-Week Pregnant Woman: A Case Report.

PURPOSE: Undifferentiated embryonal sarcoma of the liver (UESL) is a rare malignant lesion in adults. Here, we present an extremely rare case of UESL in a pregnant woman. However, this was the first case, wherein one surgery covered all the procedures needed to be performed, including delivery of the neonate, hysterectomy, and resection of the left liver lobe to ensure the safety of both the mother and the newborn. CASE PRESENTATION: A 32-year-old woman at 37-weeks age of gestation was admitted at Bach Mai Hospital (Hanoi, Vietnam) due to epigastric pain, chest pain, and breathing difficulty. Blood tests showed an increased total alpha-fetoprotein level of 1085 ng/mL. Fetal ultrasound showed a fetal heart rate of 127 beats/minute, biparietal diameter of 92 mm, femur length of 70 mm, and fetal weight of 3287 g. Magnetic resonance imaging indicated a large tumor (12 × 14 × 18 mm) in the left liver, with organ signals increased on T2-weighted and decreased on T1-weighted. The mass was lobulated, developed along a downward pattern, and did not invade the portal vein. The surgeries performed were cesarean section, hysterectomy due to the inelasticity of the uterus, and left hepatectomy to ensure the safety of both the mother and newborn. The operation was performed safely and without any complications, and the patient was discharged from the hospital after 10 days. CONCLUSION: This case report with distinct characteristics has been the first case ever reported in Vietnam, as well as in the literature. We believe that this case report will be useful for the clinical evidence pool and for educational purposes.

Prevalence of and susceptibility to cigarette smoking among female students aged 13 to 15 years in Vietnam, 2007.

INTRODUCTION: Recent reports show a sharp increase in smoking rates among girls. We describe prevalence of cigarette smoking and susceptibility to cigarette smoking among female students aged 13 to 15 years in Vietnam and examine the associated factors. METHODS: We used data from female secondary school students aged 13 to 15 years (grades 8-10) from the 2007 Global Youth Tobacco Survey that was conducted in 9 provinces in Vietnam. We used multivariate logistic regression analysis to determine associations between independent variables with smoking status and susceptibility to smoking. RESULTS: Prevalence of cigarette smoking among girls was 1.2% (95% confidence interval [CI], 0.9-1.5), and 1.5% (95% CI, 1.2-1.9) of girls were susceptible to smoking. Having friends who smoke was the strongest predictor of both smoking status and susceptibility to smoking. Attendance at school classes that described the harmful effects of smoking had significant effects in reducing cigarette smoking. Girls who were exposed to billboard cigarette advertising were more likely to be susceptible to smoking than were those who had not seen advertisements. CONCLUSION: Our findings highlight the need for pursuing school-based intervention programs in Vietnam and for countering tobacco advertising and marketing practices that target young women.

Costing of clinical services in rural district hospitals in northern Vietnam.

OBJECTIVES: This study aimed to estimate and analyse the "actual" unit cost of providing key clinical services in selected rural district hospitals in the North of Vietnam. It also examined the relationship between actual costs and the levels of cost covered by the corresponding user fees paid by patients. METHODS: This was a facility-based costing study which estimates the costs of health care services from the perspective of the service providers. Three rural district hospitals from three provinces in the North of Vietnam were purposively selected for this study. The "step-down" approach was applied. RESULTS: There was little difference in the costs of an outpatient visit across the hospitals, but the costs of an operation and an inpatient day varied considerably. In terms of cost structure, personnel costs accounted for the highest share of total cost of the clinical services. The shares of operating cost were considerable while depreciation of buildings/equipments made up a small "proportion". The study results revealed that the user fee levels were much lower than the actual costs of providing the corresponding services. The present study highlights the importance of costing data for hospital planning and management.

Secondhand Tobacco Smoke Exposure in Indoor Workplaces in Viet Nam and Associated Factors: Findings from Two Rounds of Global Adult Tobacco Surveys (GATS) 2010 and 2015.

OBJECTIVES: This paper explores changes in the level of secondhand smoke (SHS) exposure at indoor workplaces between 2010 and 2015 in Viet Nam and the association between the exposure and various demographic factors, using data from Viet Nam's Global Adult Tobacco Surveys (GATS) 2010 and 2015. METHODS: Data was pooled from the two GATS surveys and analysed using descriptive and Poisson regression analyses. RESULTS: There was a highly statistically significant reduction in the level of SHS exposure at indoor workplaces from 55.9% to 42.6% (p.

Multilevel Analysis of 24-Hour Blood Pressure, Heart Rate, and Associated Factors among Police Officers in Hanoi, Vietnam.

BACKGROUND: Due to long-hour outdoor working environment, policemen have been subjected to tremendous health risks including blood pressure (BP) and heart rate (HR). In tropical countries, the temperature is extremely harsh which may get peak at above 40 Celsius degrees or drops under 8 Celsius degrees. However, the existing data on the effects of weather variation on BP and HR among police task force has been scarce in Vietnam. AIMS: This study aimed to describe the variation of 24-hour BP and HR and identify factors associated with BP and HR for further appropriate interventions in order to reduce health risks from occupational exposure. METHODS: Multilevel regression analysis (MLRA) was applied with two levels of influent factors. 24-hour holter measured systolic blood pressure (SBP), diastolic blood pressure (DBP), and HR values were the first level which should then be nested in the second level (individual). 24-hour temperature and humidity variations were extracted, respectively, from Hanoi Hydrometeorology Department. All individual characteristics and risk behaviours were measured within 24 studying hours. RESULTS: Temperature and humidity were major factors that influenced (74%-78%) the variation of BP and HR among the policemen population. When each of the Celsius degree temperature or percentage humidity increases, the SBP goes down by 0.44 (0.11-0.77) and by 0.2 (0.33-0.77), respectively, and the DBP goes down by 0.21 (-0.05-0.48) and by 0.12 (0.02-0.22), respectively, and vice versa. Interaction between temperature and humidity was significantly influent to SBP. The farther the time section from the first time section (0-6AM) the more the variation of the BP and HR. Transition from winter to summer made SBP and DBP decrease and vice versa. Individual characteristics including body mass index (BMI), bad life styles, and stress contributed 22% to 26% to the variation of BP and HR. Traffic policemen were at the greatest risks of the outdoor ambient variation in comparison with the firefighters and office-based policemen. CONCLUSION: Designing and equipping appropriate uniform and outdoor facilities could help to reduce influence of temperature and humidity variation in the outdoor workplace. Besides, training and educating programs that aimed at controlling BMI, risk behaviours, and stress for police taskforce, especially the traffic policemen, should be implemented.

Engaging village health workers in non-communicable disease (NCD) prevention and control in Vietnam: A qualitative study.

The burden of non-communicable diseases (NCDs) continues to grow in Vietnam, and reducing the burden of NCDs is a national priority. This study explored perspective of community health workers (CHWs), known as Village Health Workers (VHWs) in Vietnam, and public health leaders towards potential of expanding VHWs' role to deliver NCDs prevention and control services, and determined barriers and facilitators. We conducted focus group discussions (FGDs) with VHWs (n = 24) and in-depth interviews (IDIs) with public health administrators (n = 13). The findings show that VHWs in Vietnam deliver multiple public health services, including several NCDs related services. Perceived barriers include lack of policy support, shortages of trained health personnel, lack of training, imbalanced workload and inadequate remuneration. Perceived barriers include lack of policy support, shortages of trained health personnel, lack of training, imbalanced workload and inadequate remuneration. Facilitators include government commitment to NCDs prevention and control, priority on capacity building, professional recognition and provision of incentives with availability of appropriate resources. While additional quantitative studies are needed to supplement the current qualitative findings, the current results inform the policy and intervention development in engaging VHWs in the delivery of community-based NCDs prevention and control initiatives in Vietnam.

Self-reported psychological distress among caregivers of patients with cancer: Findings from a health facility-based study in Vietnam 2019.

In Vietnam, little is elucidated in scientific literatures about the mental health of caregivers of people with cancer. We conducted a cross-sectional study to report the situation and correlates of self-reported psychological distress among caregivers of cancer patients in Vietnam in 2019. Multiple logistic and linear regression analyses were performed. A total of 16.5% of the study participants had psychological distress. Respondent's mean score of negative emotion was 7.6 ± 2. Educational level and type of support were significantly associated with having psychological distress among caregivers. Gender, occupation, financial difficulty, treatment belief and social support significantly correlated to psychological distress level of caregivers.

Access to Improved Water Sources and Sanitation in Minority Ethnic People in Vietnam and Some Sociodemographic Associations: A 2019 National Survey.

BACKGROUND: Achieving access to clean water and basic sanitation remains as major challenges in Vietnam, especially for vulnerable groups such as minority people, despite all the progress made by the Millennium Development Goal number 7.C. OBJECTIVES: The study aimed to describe the access to improved water sources and sanitation of the ethnic minority people in Vietnam based on a national survey and to identify associated factors. METHODS: A cross-sectional study was conducted in 2019 with a sample size of 1385 ethnic minority households in 12 provinces in Vietnam. Multivariate logistic regression modeling was performed to examine the probability of having access to improved water sources and sanitation and sociodemographic status at a significance level of P < .05. RESULTS: The access to improved water sources and sanitation was unequal among the ethnic minority people in Vietnam, with the lowest access rate in the northern midland and mountainous and Central Highland areas and the highest access rate in the Mekong Delta region. Some sociodemographic variables that were likely to increase the ethnic minority people's access to improved water sources and/or sanitation included older age, female household heads, household heads with high educational levels, religious households, and households in not poor status. CONCLUSION AND RECOMMENDATIONS: The study suggested more emphasis on religion for improving the ethnic minority's access to improved water sources and sanitation. Besides, persons of poor and near-poor status and with low educational levels should be of focus in future water and sanitation intervention programs.

Willingness to use and pay for smoking cessation service via text-messaging among Vietnamese adult smokers, 2017.

OBJECTIVES: To examine willingness to use (WTU) and willingness to pay (WTP) for smoking cessation service via text-messaging among adult smokers in Vietnam in 2017; and to identify demographic and socioeconomic factors associated with the WTU and WTP. METHODS: A cross-sectional study of 602 adult smokers who had intention to quit in the next 12 months was conducted in Vietnam in 2017. Participants were provided with the information about a mobile health (mHealth) smoking cessation service via text-messaging and asked about their willingness to use and pay for it. The contigent valuation method was used to estimate the WTP for the service, using single bound question format. Discrete choice model was applied to estimate the average WTP and its associated factors. RESULTS: Seventy-two percent of smokers expressed willingness to use smoking cessation service via text-messaging if it were available. The average willingness to pay among those interested in using the mHealth cessation service was 82,000 VND (US$3.5). Smoking status and quit attempts in the last twelve months were associated with WTU, whereas age of the smokers and monthly income were significant predictors of WTP. CONCLUSION: A high proportion of Vietnamese smokers with intention to quit were interested in using smoking cessation services via text-messaging. The high level of smokers' willingness to use and pay for the text messaging cessation program indicates the mHealth methods could be a potential option for developing and delivering smoking cessation services in Vietnam.