Margaret Thomas

Dr. Margaret Thomas


Research Focus & Metrics

Academic Career Length

33Years (1994-Present)

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

Representative Publications

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BNBinh Nguyen
Binh Nguyen
LCLeonie Cranney
Leonie Cranney
WBWilliam Bellew
William Bellew
MTMargaret Thomas
Margaret Thomas
Background: Policies that support healthier food environments, including healthy retail food availability and promotion, are an important strategy for obesity prevention. The aim of this systematic review was to examine the evidence for barriers and enablers to successful implementation of healthy food and drink policies, delivered at scale. Methods: MEDLINE, SCOPUS and INFORMIT were searched to May 2019 for peer-reviewed studies. Google and Google Scholar were searched for grey literature. Studies of any design relating to a healthy food and drink policy delivered at scale (≥10 sites) in non-commercial food settings, for specific retail outlets (e.g., vending machines, cafes, cafeterias, school canteens), and that reported on implementation barriers and/or enablers were included. Studies in commercial food retail environments (e.g., supermarkets) were excluded. Studies were appraised for quality and key information was extracted and summarised. Extracted information on barriers and enablers was further grouped into overarching themes relating to perceptions of the policy itself, organisational and contextual factors influencing policy implementation, stakeholder responses to the implemented policy and perceived policy impacts. Results: Of 19 studies, 16 related to policies implemented in schools, two in hospital/health facilities and one in a sport/recreation setting. Most studies were conducted in North America or Australia, and policy implementation occurred mainly at state/regional or federal levels. The most commonly cited barriers across overarching themes and intervention settings were: lack of stakeholder engagement or prioritisation of the policy (11 studies); resistance to change from school stakeholders or customers (8 studies); and concern over profitability, revenue and/or commercial viability (8 studies). Few studies reported on mitigation of barriers. Enablers most commonly raised were: stakeholder engagement, whole-school approach and/or prioritisation of the policy (9 studies); policy level or higher-level support in the form of information, guidance and/or training (5 studies); and leadership, school/policy champion, management commitment and/or organisational capacity (4 studies). Conclusions: Key considerations for policy implementation ranged from building stakeholder support, prioritising policy implementation within organisations, to implementing strategies that address financial concerns and implementation barriers.

1 February 1994 in Medical Journal of Australia
Verified
Journal Article
Closed access
PDF file
GAGarth Alperstein
Garth Alperstein
MFMichael J Fett
Michael J Fett
RRRobert Reznik
Robert Reznik
MTMargaret Thomas
Margaret Thomas
MSMani Senthil
Mani Senthil
Objective To determine the prevalence of tuberculosis (TB) infection in Year 8 schoolchildren (aged 12‐14 years) in Sydney. Design Cross‐sectional survey. Setting 22 inner city Sydney secondary ...

MTMargaret Thomas
Margaret Thomas
JGJessica Gugusheff
Jessica Gugusheff
HBHeather Baldwin
Heather Baldwin
JGJoanne Gale
Joanne Gale
SBSinead Boylan
Sinead Boylan
Seema MihrshahiSeema Mihrshahi
Seema Mihrshahi
Protecting children’s mental health is important and studies have shown that diet and exercise can have a positive impact. There are limited data available, however, from representative populations of children on the relationship between regular healthy lifestyle behaviours and psychological health. Data were obtained from the New South Wales Child Population Health Survey, 2013–2014. Parents were asked about diet, physical activity and screen time behaviours and completed the Strengths and Difficulties Questionnaire (SDQ) for one child aged 5–15. Higher SDQ scores indicate poorer psychological health and risk for mental health problems. Multivariable linear and logistic regression examined the relationships among dietary consumption, physical activity, screen time and SDQ scores, adjusting for potential confounding. Meeting screen time recommendations was most strongly associated with a lower SDQ total difficulties score (5–10 years: −1.56 (−2.68, −0.44); 11–15 years: −2.12 (−3.11, −1.12)). Children and adolescents who met screen time recommendations were also significantly less likely to have any score in the at-risk range. Children and adolescents meeting vegetable intake guidelines had significantly lower total difficulties scores (5–10 years: −1.54 (−3.03, −0.05); 11–15 years: −1.19 (−3.60, −0.39)), as did adolescents meeting discretionary food guidelines (−1.16 (−2.14, −0.18)) and children consuming the recommended fruit intake (−1.26 (−2.42, −0.10)). Our findings indicate that more effective interventions to increase the proportion of young Australians who meet the guidelines for diet and screen time would contribute to protecting their mental health.

1 November 2020 in Journal of Physical Activity and Health
Verified
Journal Article
Closed access
PDF file
JGJessica Gugusheff
Jessica Gugusheff
Bridget C FoleyBridget C Foley
Bridget C Foley
KOKatherine B. Owen
Katherine B. Owen
BDBradley Drayton
Bradley Drayton
DDDing Ding
Ding Ding
MTMargaret Thomas
Margaret Thomas
Background: A combination of walking, other moderate physical activity, and vigorous physical activity is recommended for achieving good health. Vigorous activity has unique health benefits but may be less accessible to disadvantaged people. To reduce health inequity, we need to understand the differences in physical activity participation among socioeconomic subgroups and whether this is changing over time. Methods: Data from the 2002 to 2015 Adult New South Wales Population Health Surveys (164,652 responses) were analyzed to investigate trends in walking, moderate and vigorous physical activity participation by socioeconomic status as measured by educational attainment. Analysis used age- and sex-adjusted multivariable linear models that accounted for complex survey design. Results: In 2002, the highest socioeconomic group spent 18.5 (95% confidence interval, 8.2–28.8) minutes per week more than the lowest socioeconomic group being vigorously active. By 2015, this gap had steadily increased to 41.4 (95% confidence interval, 27.6–55.1) minutes per week. Inequity between groups was also found for duration of moderate activity but not for time spent walking. Conclusions: Low participation in vigorous activity in the lowest socioeconomic group is likely driving increasing inequities in physical activity and widening participation gaps over time. Barriers preventing the most disadvantaged people in New South Wales from engaging in vigorous activity should be addressed urgently.

16 April 2024 in PLOS ONE
Verified
Journal Article
Open access
PDF file
JKJames Kite
James Kite
MTMargaret Thomas
Margaret Thomas
BBBill Bellew
Bill Bellew
ABAdrian Bauman
Adrian Bauman
AGAnne Grunseit
Anne Grunseit
Mass media campaigns are frequently used to address public health issues. Considering the considerable cost, there has been little analysis of why campaigns sometimes fail. This study used a sequential mixed methods approach to explore the mechanisms that can lead to failure and to identify what can be done to avoid or overcome common mistakes in campaign planning, implementation, and evaluation. We conducted interviews and a survey with 28 public health social marketing and mass media campaign experts over three rounds of research and analysed the data thematically, generating themes inductively. We identified four systemic factors that drive success: long-term strategic thinking and commitment, understanding the campaign context, doing and learning from evaluation, and fostering strong relationships. The factors did not operate in isolation, rather good (or poor) execution in one area was likely to influence performance in another. The experts also emphasised that a change of political context could drastically affect one or more of the identified factors. Our analysis showed that campaign failures are not simply individuals making mistakes. Systemic issues throughout the planning, execution, and evaluation phases need to be addressed if campaign outcomes are to improve.

7 August 2022 in Journal of Health Services Research & Policy
Verified
Journal Article
Closed access
LCLeonie Cranney
Leonie Cranney
MTMargaret Thomas
Margaret Thomas
TOTarli O’cOnnell
Tarli O’cOnnell
RMRenee Moreton
Renee Moreton
LCLucy Corbett
Lucy Corbett
PPPhilayrath Phongsavan
Philayrath Phongsavan
Objective: In 2017, the Australian state of New South Wales introduced a revised policy to provide a healthy food and drink environment for staff and visitors in the state’s publicly funded health facilities. We sought to understand how contextual factors, intervention features and the responses of diverse stakeholders affected the policy’s implementation in public hospitals. Methods: Ninety-nine interviews were conducted with chief executives, implementers and retailers in the health and food retail systems after the target date for the implementation of 13 initial policy practices. Stakeholder responses were analysed to understand commitment to, engagement with and achievement of these practices and the different contexts and implementation approaches that prompted these responses. Results: Key mechanisms that drove systemic change included stakeholders’ broad acceptance of the policy premise; stakeholders’ sense of accountability and desire for the policy to succeed; and the policy’s perceived benefits, feasibility and effectiveness. Important underpinning factors were chief executives’ commitment to implementation and monitoring, a flexible approach to locally tailored implementation and historical precedents. Conclusions: This study provides policy and practice insights for the initial phase of state-wide implementation to achieve change in health facility food retail environments.