Tan Nguyen

Mr. Tan Nguyen

Deakin University
orcid

Research Focus & Metrics

Academic Career Length

10Years (2017-Present)

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

Representative Publications

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7 November 2022 in Obesity Reviews
Verified
Journal Article
Open access
MSMOOSA AL SUBHI
MOOSA AL SUBHI
MBMiranda R Blake
Miranda R Blake
TNTan Nguyen
Tan Nguyen
IMIshani Majmudar
Ishani Majmudar
MMMarj Moodie
Marj Moodie
Jaithri AnanthapavanJaithri Ananthapavan
Jaithri Ananthapavan
Summary: Food retail strategies to improve the healthiness of food and beverage options may increase purchasing of healthier options and improve diets. Consumer demand for healthier options is an important determinant of the successful implementation and maintenance of healthy food retail interventions. A systematic review of peer‐reviewed literature was undertaken to explore whether consumers are willing to pay more for healthier foods and to determine the key factors that influence willingness to pay. Fifteen studies reported the results of 26 experiments providing willingness to pay estimates for healthier food products across a range of food retail environments. Twenty three out of the 26 experiments included in this review (88.5%) found consumers would pay a 5.6% to 91.5% (mean 30.7%) price premium for healthier foods. Studies consistently found a positive willingness to pay for foods with reduced fat and wholegrains with additional fruit and vegetables, while willingness to pay for foods with reduced salt or a combination of low fat and sugar, or salt showed mixed results. Adults over 60 years, females, those living with obesity, and consumers who aim to maintain a healthy lifestyle were more likely to pay a price premium for healthier food, whereas younger consumers, consumers with healthy weight, and consumers with higher levels of education were less likely to pay higher prices. The results of this review contribute to our understanding of consumer preferences for healthier products and provide information to retailers on consumer surplus (benefits) associated with the provision of healthier food alternatives.

12 September 2022 in Applied Health Economics and Health Policy
Verified
Journal Article
Open access
PDF file
TNTan Nguyen
Tan Nguyen
UTUtsana Tonmukayakul
Utsana Tonmukayakul
LLLong Le
Long Le
HCHanny Calache
Hanny Calache
CMCathrine Mihalopoulos
Cathrine Mihalopoulos
Objectives To critically examine the methods used for full economic evaluations of preventive interventions for dental caries and periodontitis. Methods Published literature post-2000 was searched to April 2021. Based on a developed intervention classification framework for dental caries and periodontitis, only universal, selective or indicated interventions were included in this review. The Drummond 10-point checklist was used for quality appraisal. Results Of 3,007 unique records screened for relevance, 73 studies were reviewed. Most model-based studies (61/73) used cost-effectiveness analysis (49%) or cost-benefit analysis (28%). Trial-based studies (16/73) commonly used cost-effectiveness analysis (59%). Four studies used both economic evaluation methods. Sixty-four papers (88%) were on dental caries, eight papers (11%) focused on periodontitis, and one paper (1%) included both oral diseases; 72% of model-based and 82% of trial-based studies were of good quality. The most frequently investigated dental caries preventive interventions were water fluoridation (universal intervention; cost-saving or cost-effective), fissure sealant and fluoride varnish (selective and indicated interventions; cost-effectiveness outcomes were inconsistent). Supportive periodontal therapy with oral health education (indicated intervention; cost-effective) was the most frequently evaluated preventive intervention for periodontitis. Thirty percent of studies with a time horizon > 1 year did not apply an appropriate discount rate and 26% did not comprehensively discuss other important considerations beyond the technical analysis. Conclusions Generic health outcome measures should be incorporated for economic evaluations on preventive interventions for dental caries and periodontitis, and an increased focus to prevent periodontitis using economic evaluation methods is needed to inform resource allocation and policy decision-making.

28 February 2020 in Nutrients
Verified
Journal Article
Open access
PDF file
Anita LalAnita Lal
Anita Lal
APAnna Peeters
Anna Peeters
VBVicki Brown
Vicki Brown
PNPhuong Nguyen
Phuong Nguyen
Huong Ngoc Quynh TranHuong Ngoc Quynh Tran
Huong Ngoc Quynh Tran
Jaithri AnanthapavanJaithri Ananthapavan
Jaithri Ananthapavan
Over one third of Australians’ daily energy intake is from discretionary foods and drinks. While many health promotion efforts seek to limit discretionary food intake, the population health impact of reductions in the consumption of different types of discretionary foods (e.g., sugar-sweetened beverages (SSBs), confectionery, sweet biscuits) has not been quantified. This study estimated the potential reductions in body weight, obesity-related disease incidence, and healthcare cost savings associated with consumption of one less serving per week of different discretionary foods. Reductions in the different types of discretionary food were modelled individually to estimate the impact on energy consumption and population body weight by 5-year age and sex groups. It was assumed that one serving of discretionary food each week was replaced with either a serving of fruit or popcorn, and a serving (375 mL) of SSBs was replaced with coffee, tea, or milk. Proportional multi-state multiple-cohort Markov modelling estimated likely resultant health adjusted life years (HALYs) gained and healthcare costs saved over the lifetime of the 2010 Australian population. A reduction of one serving of SSBs (375 mL) had the greatest potential impact in terms of weight reduction, particularly in ages 19–24 years (mean 0.31 kg, 95% UI: 0.23 kg to 0.37 kg) and overall healthcare cost savings of AUD 793.4 million (95% UI: 589.1 M to 976.1 M). A decrease of one serving of sweet biscuits had the second largest potential impact on weight change overall, with healthcare cost savings of $640.7 M (95% CI: $402.6 M to $885.8 M) and the largest potential weight reduction amongst those aged 75 years and over (mean 0.21 kg, 95% UI: 0.14 kg to 0.27 kg). The results demonstrate that small reductions in discretionary food consumption are likely to have substantial health benefits at the population level. Moreover, the study highlights that policy responses to improve population diets may need to be tailored to target different types of foods for different population groups.

2 August 2019 in Health Promotion Journal of Australia
Verified
Journal Article
Open access
PDF file
TNTan Nguyen
Tan Nguyen
UTUtsana Tonmukayakul
Utsana Tonmukayakul
EWEmma Warren
Emma Warren
SCSusan Cartwright
Susan Cartwright
DLDanny Liew
Danny Liew
Issue addressed: Biannual application of fluoride varnish is effective for dental caries prevention, but its cost‐effectiveness using quality‐adjusted life years (QALY) is unknown. This study performed a cost‐effectiveness analysis, from the Australian health care system perspective of biannual application of fluoride varnish versus current practice (non‐routine application) for an individual aged 15 years and older over a 70‐year time horizon.Methods: Health outcomes measured were the number of prevented decayed, missing, and filled teeth (prevented‐DMFT) and QALY gained. The calculated incremental cost‐effectiveness ratio (ICER) was compared against the reference cost‐effectiveness ICER threshold of AUD$28 033 per QALY gained. A published Markov model capturing dental caries progression of eight permanent molars was used. This 6‐monthly cycle model represented ten possible health states for an individual tooth. A 5% discount rate was applied with relevant sensitivity analysis.Results: In the base‐case scenario, the net cost for the intervention was $3600 compared to $2303 in the current practice arm. The intervention arm yielded 13.99 DMFT and 15.44 QALY gained, whereas the current practice arm yielded 15.52 DMFT and 14.74 QALY gained. The estimated ICER was $849 per prevented‐DMFT and $1851 per QALY gained. Sensitivity analysis shows the ICER ranged from $424‐$1807 per prevented‐DMFT and $1851‐$3941 per QALY gained.Conclusion: Biannual professional application of fluoride varnish appears to be a highly cost‐effective strategy and should be considered for universal funding in Australia's health care system.

4 May 2023 in Journal of Public Health Policy
Verified
Journal Article
Open access
PDF file
TNTan Nguyen
Tan Nguyen
GBGemma Bridge
Gemma Bridge
MHMartin Hall
Martin Hall
KTKaty Theodore
Katy Theodore
CLClare Lin
Clare Lin
HCHanny Calache
Hanny Calache
The 2021 Resolution on Oral Health by the 74th World Health Assembly supports an important health policy direction: inclusion of oral health in universal health coverage. Many healthcare systems worldwide have not yet addressed oral diseases effectively. The adoption of value-based healthcare (VBHC) reorients health services towards outcomes. Evidence indicates that VBHC initiatives are improving health outcomes, client experiences of healthcare, and reducing costs to healthcare systems. No comprehensive VBHC approach has been applied to the oral health context. Dental Health Services Victoria (DHSV), an Australian state government entity, commenced a VBHC agenda in 2016 and is continuing its efforts in oral healthcare reform. This paper explores a VBHC case study showing promise for achieving universal health coverage that includes oral health. DHSV applied the VBHC due to its flexibility in scope, consideration of a health workforce with a mix of skills, and alternative funding models other than fee-for-service.

30 May 2019 in Human Resources for Health
Verified
Journal Article
Open access
PDF file
TNTan Nguyen
Tan Nguyen
UTUtsana Tonmukayakul
Utsana Tonmukayakul
HCHanny Calache
Hanny Calache
Dental services can be provided by the oral health therapy (OHT) workforce and dentists. This study aims to quantify the potential cost-savings of increased utilisation of the OHT workforce in providing dental services for children under the Child Dental Benefits Schedule (CDBS). The CDBS is an Australian federal government initiative to increase dental care access for children aged 2–17 years. Dental services billed under the CDBS for the 2013–2014 financial year were used. Two OHT-to-dentist workforce mix ratios were tested: Model A National Workforce (1:4) and Model B Victorian Workforce (2:3). The 30% average salary difference between the two professions in the public sector was used to adjust the CDBS fee schedule for each type of service. The current 29% utilisation rate of the CDBS and the government target of 80% were modelled. The estimated cost-savings under the current CDBS utilisation rate was AUD 26.5M and AUD 61.7M, for Models A and B, respectively. For the government target CDBS utilisation rate, AUD 73.2M for Model A and AUD 170.2M for Model B could be saved. An increased utilisation of the OHT workforce to provide dental services under the CDBS would save costs on public dental service funding. The potential cost-savings can be reinvested in other dental initiatives such as outreach school-based dental check programmes or resource allocation to eliminate adult dental waiting lists in the public sector.