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Table 1 Diagnostic criteria to classify overweight and obesity

From: Diagnosis, treatment and prevention of pediatric obesity: consensus position statement of the Italian Society for Pediatric Endocrinology and Diabetology and the Italian Society of Pediatrics

Age 0–2 years 2–5 years 5–18 years
Index Weight-to-lenght ratio BMI BMI
Reference WHO 2006 WHO 2006 WHO 2007
>85th percentilea At risk of overweight At risk of overweight Overweight
>97th percentilea Overweight Overweight Obesity
>99th percentilea Obesity Obesity Severe obesity
  1. athe 85th, 97th and 99th percentiles approximate z-scores of + 1, + 2 and + 3, respectively