A Massachusetts General Hospital (MGH) team reports in the American Journal of Preventive Medicine that the previously reported changes in the proportions of more and less healthy foods purchased in the months after their program began have persisted up to two years after the labeling intervention was introduced.
"Our current results show that the significant changes in the purchase patterns of both hospital employees and all customers resulting from the labels and the choice architecture program did not fade away as cafeteria patrons became used to them," says Anne Thorndike, MD, MPH, of the MGH Division of General Medicine, who led the study. "This is good evidence that these changes in healthy choices persist over time."
Initiated in March of 2010, the program was developed by the research team – including leaders of the MGH Food and Nutrition Service – to deliver information about healthy food choices in a simplified way that did not require reading and understanding detailed food labels. The first phase involved the application of "traffic light" labels – green for the healthiest items, such as fruits, vegetables and lean sources of protein; yellow for less healthy items, and red for those with little or no nutritional value – to all items in the main hospital cafeteria. Several weeks before the labels were introduced, cafeteria cash registers began to identify and record each purchased item as red, yellow or green.
The second "choice architecture" phase, started three months after the labels were introduced, focused on cold beverages, pre-made sandwiches and chips – all of which were rearranged to display more healthful items where they were most likely to be selected. For example, bottled water, diet beverages and low-fat dairy products were positioned at eye level, while beverages with yellow or red labels were placed at lower levels.
As the team reported in the March 2012 American Journal of Public Health, at the end of the initial six-month study period, the program led to significant increases in the purchases of "green" items and reduced purchases of "red" items, with the largest changes in beverage purchases. A subsequent study in the September 2012 American Journal of Preventive Medicine, focused on employees enrolled in a program in which their meals could be paid by payroll deduction, revealed similar changes in purchase patterns across all racial and ethnic groups as well as job types.
The current study analyzed purchase patterns for the 24 months following the program's implementation and found that the changes present at the end of the first year were virtually unchanged at the end of the second. Overall, purchases of "green" items had increased 12 percent, compared with the pre-intervention period, and "red" item purchases dropped 20 percent. Purchases of "red" beverages – primarily sugar-sweetened beverages – dropped 39 percent, while "green" beverage purchases increased 10 percent. The changes remained similar for all types of employees, and overall cafeteria sales during the two-year period were stable.
"These findings are the most important of our research thus far because they show a food labeling and product placement intervention can promote healthy choices that persist over the long term, with no evidence of 'label fatigue,' " says Thorndike, an assistant professor of Medicine at Harvard Medical School. "The next steps will be to develop even more effective ways to promote healthy choices through the food service environment and translate these strategies to other worksite, institutional or retail settings."
Co-authors of the American Journal of Preventive Medicine article are Lillian Sonnenberg, DSc, RD, MGH Nutrition and Food Service; Douglas Levy, PhD, Mongan Institute for Health Policy at MGH; and Jason Riis, PhD, Harvard Business School. The study was supported by the Robert Wood Johnson Foundation, the Donoghue Foundation, and National Heart, Lung, and Blood Institute grant K23 HL93221.
Massachusetts General Hospital, founded in 1811, is the original and largest teaching hospital of Harvard Medical School. The MGH conducts the largest hospital-based research program in the United States, with an annual research budget of more than $775 million and major research centers in AIDS, cardiovascular research, cancer, computational and integrative biology, cutaneous biology, human genetics, medical imaging, neurodegenerative disorders, regenerative medicine, reproductive biology, systems biology, transplantation biology and photomedicine.
Cassandra Aviles | EurekAlert!
Speed data for the brain’s navigation system
06.12.2016 | Deutsches Zentrum für Neurodegenerative Erkrankungen e.V. (DZNE)
Study suggests possible new target for treating and preventing Alzheimer's
02.12.2016 | Oregon Health & Science University
In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...
Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
06.12.2016 | Power and Electrical Engineering
06.12.2016 | Earth Sciences
06.12.2016 | Physics and Astronomy