The Association Between Diet Quality and Weight Change in Adults Over Time: A Systematic Review of Prospective Cohort Studies

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Abstract

Obesity is defined as an excess of body fat. Different methods can be used to determine the degree of adiposity, with body mass index (BMI) being a commonly used indirect method [1]. BMI is defined as weight in kilograms divided by the square of height, in metres. According to the WHO BMI classifications, obesity is defined as BMI ≥30 kg/m2, while overweight is defined as 25 ≤ BMI < 30 kg/m2 [2].