Fig 1. Prevalence of morbid obesity (Fig 1a) and prevalence of severe obesity (Fig 1b) among children with obesity 1985, 1995, 2007 and 2012.

Morbid obesity was defined as age and sex adjusted BMI≥ 35kg/m² at 18 years) (2) and severe obesity included class 2 and 3 and was defined as BMI ≥120% 95th percentile of the CDC 2000 growth references, or a BMI ≥35kg/m², whichever was lower (3).Statistical significance was determined by chi-squared test.