student profile: Ms Amanda Grech


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Thesis work

Thesis title: Generational changes in the energy-density and diet quality of Australian diets and the obesity epidemic

Supervisors: Margaret ALLMAN-FARINELLI , Anna RANGAN

Thesis abstract:

The etiology of the global obesity epidemic is multi-factorial and complex, but broadly weight gain is explained by energy imbalance. “Obesogenic” environments are thought to promote energy imbalance through increased dietary energy and sedentary behavior while decreasing physical activity of the population. While there are several commonly held hypotheses about the nutritional changes that have taken place that may be precipitating the obesity epidemic, the actual changes to the population’s diet are still poorly understood. One hypothesis main hypothesis is that the energy density (kJ/g) of the diet has increased over time – as the total volume of food consumed daily remains fairly constant, a diet of high energy density will increase the total consumption of energy and potentially lead to over consumption. Another potential contributing factor to the obesity epidemic is that the diet quality of the population has deteriorated, with reduced intake of nutrient-dense core foods and increased consumption of dicretionary foods high in added sugars, fats and sodium. The aim of this research is to test the hypothesis of energy-density and to assess diet quality, to determine if changes have occurred at a population level. As age-period-cohort analysis of the prevalence of obesity has revealed that although older age groups have the highest prevalence of obesity, younger generations are at greater risk of developing obesity, in addition to temporal dietary changes, age and cohort difference will be also be examined. This will allow for more specific recommendations to be formulated for population subgroups. Data from three Australian national nutrition surveys spanning the past thirty years will be used for this analysis.

Selected publications

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Journals

  • Rouf, A., Grech, A., Allman-Farinelli, M. (2018). Assessing the efficacy and external validity of interventions promoting calcium or dairy intake in young adults: A systematic review with meta-analysis. Critical Reviews in Food Science and Nutrition, In Press, 1-17. [More Information]
  • Hayba, N., Partridge, S., Nour, M., Grech, A., Allman-Farinelli, M. (2018). Effectiveness of lifestyle interventions for preventing harmful weight gain among young adults from lower socioeconomic status and ethnically diverse backgrounds: a systematic review. Obesity Reviews, 19(3), 333-346. [More Information]
  • Grech, A., Hebden, L., Roy, R., Allman-Farinelli, M. (2017). Are products sold in university vending machines nutritionally poor? A food environment audit. Nutrition and Dietetics, 74(2), 185-190. [More Information]
  • Grech, A., Rangan, A., Allman-Farinelli, M. (2017). Dietary Energy Density in the Australian Adult Population from National Nutrition Surveys 1995 to 2012. Journal of The Academy of Nutrition and Dietetics, 117(12), 1887-1899.e2. [More Information]
  • Grech, A., Rangan, A., Allman-Farinelli, M. (2017). Increases in alcohol intakes are concurrent with higher energy intakes: Trends in alcohol consumption in australian national surveys from 1983, 1995 and 2012. Nutrients, 9(9), 1-16. [More Information]
  • Grech, A., Rangan, A., Allman-Farinelli, M. (2017). Social Determinants and Poor Diet Quality of Energy-Dense Diets of Australian Young Adults. Healthcare, 5(4), 1-13. [More Information]
  • Grech, A., Sui, Z., Siu, H., Zheng, M., Allman-Farinelli, M., Rangan, A. (2017). Socio-Demographic Determinants of Diet Quality in Australian Adults Using the Validated Healthy Eating Index for Australian Adults (HEIFA-2013). Healthcare, 5(1), 1-12. [More Information]
  • Nour, M., Sui, Z., Grech, A., Rangan, A., McGeechan, K., Allman-Farinelli, M. (2017). The fruit and vegetable intake of young Australian adults: a population perspective. Public Health Nutrition, 20(14), 2499-2512. [More Information]
  • Grech, A., Allman-Farinelli, M. (2016). Prevalence and period trends of overweight and obesity in Australian young adults. European Journal of Clinical Nutrition, 70(9), 1083-1085. [More Information]
  • Grech, A., Allman-Farinelli, M. (2015). A systematic literature review of nutrition interventions in vending machines that encourage consumers to make healthier choices. Obesity Reviews, 16(12), 1030-1041. [More Information]

2018

  • Rouf, A., Grech, A., Allman-Farinelli, M. (2018). Assessing the efficacy and external validity of interventions promoting calcium or dairy intake in young adults: A systematic review with meta-analysis. Critical Reviews in Food Science and Nutrition, In Press, 1-17. [More Information]
  • Hayba, N., Partridge, S., Nour, M., Grech, A., Allman-Farinelli, M. (2018). Effectiveness of lifestyle interventions for preventing harmful weight gain among young adults from lower socioeconomic status and ethnically diverse backgrounds: a systematic review. Obesity Reviews, 19(3), 333-346. [More Information]

2017

  • Grech, A., Hebden, L., Roy, R., Allman-Farinelli, M. (2017). Are products sold in university vending machines nutritionally poor? A food environment audit. Nutrition and Dietetics, 74(2), 185-190. [More Information]
  • Grech, A., Rangan, A., Allman-Farinelli, M. (2017). Dietary Energy Density in the Australian Adult Population from National Nutrition Surveys 1995 to 2012. Journal of The Academy of Nutrition and Dietetics, 117(12), 1887-1899.e2. [More Information]
  • Grech, A., Rangan, A., Allman-Farinelli, M. (2017). Increases in alcohol intakes are concurrent with higher energy intakes: Trends in alcohol consumption in australian national surveys from 1983, 1995 and 2012. Nutrients, 9(9), 1-16. [More Information]
  • Grech, A., Rangan, A., Allman-Farinelli, M. (2017). Social Determinants and Poor Diet Quality of Energy-Dense Diets of Australian Young Adults. Healthcare, 5(4), 1-13. [More Information]
  • Grech, A., Sui, Z., Siu, H., Zheng, M., Allman-Farinelli, M., Rangan, A. (2017). Socio-Demographic Determinants of Diet Quality in Australian Adults Using the Validated Healthy Eating Index for Australian Adults (HEIFA-2013). Healthcare, 5(1), 1-12. [More Information]
  • Nour, M., Sui, Z., Grech, A., Rangan, A., McGeechan, K., Allman-Farinelli, M. (2017). The fruit and vegetable intake of young Australian adults: a population perspective. Public Health Nutrition, 20(14), 2499-2512. [More Information]

2016

  • Grech, A., Allman-Farinelli, M. (2016). Prevalence and period trends of overweight and obesity in Australian young adults. European Journal of Clinical Nutrition, 70(9), 1083-1085. [More Information]

2015

  • Grech, A., Allman-Farinelli, M. (2015). A systematic literature review of nutrition interventions in vending machines that encourage consumers to make healthier choices. Obesity Reviews, 16(12), 1030-1041. [More Information]

Note: This profile is for a student at the University of Sydney. Views presented here are not necessarily those of the University.