According to the first study to assess diet quality in 187 countries covering almost 4.5 billion adults, the diet patterns vary widely by national income, with high-income countries generally having better diets based on healthy foods (average score difference +2.5 points), but substantially poorer diets due to a higher intake of unhealthy foods compared with low-income countries (average score difference -33.0 points). On average, older people and women seem to consume better diets.
The highest scores for healthy foods were noted in several low-income countries (eg, Chad and Mali) and Mediterranean nations (eg, Turkey and Greece), possibly reflecting favourable aspects of the Mediterranean diet. In contrast, low scores for healthy foods were shown for some central European countries and republics of the former Soviet Union (eg, Uzbekistan, Turkmenistan, and Kyrgyzstan).
Dr Imamura said that as per the projections, by 2020, non-communicable diseases would account for 75 percent of all deaths. Improving diet has a crucial role to play in reducing this burden. Policy actions in multiple domains are essential to help people achieve optimal diets to control the obesity epidemic and reduce non-communicable diseases in all regions of the world.
According to Dr Mozaffarian, there was an urgent need to focus on improving diet quality among poorer populations, as under-nutrition would be rapidly eclipsed by obesity and non-communicable diseases, as is already being seen in India, China and other middle-income countries.
Carlo La Vecchia from the University of Milan in Italy and Lluis Serra-Majem from the University of Las Palmas de Gran Canaria in Spain said that the main focus of the paper remains the need to understand the agricultural, trade and food industry and health policy determinants to improve dietary patterns and nutrition in various areas, taking into account the traditional characteristics of diets worldwide.
The study is published in The Lancet Global Health journal.
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