Dietary quality among men and women in 187 countries in 1990 and 2010: a systematic assessment

The work by Fumiaki Imamura and colleagues in The Lancet Global Health [Volume 3, No. 3, e132–e142, March 2015] is a unique attempt to evaluate measures of dietary quality and their trends in most countries worldwide. They used a wide range of data sources, including nationally representative dietary surveys, local surveys, and foods disappearance data—ie, UN Food and Agriculture balance sheets. They also adjusted for total energy intake to evaluate quality—as far as possible—independently from quantity.