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Table 1 The International Classification of adult underweight, overweight and obesity according to BMI

From: Gastroesophageal reflux symptoms among Italian university students: epidemiology and dietary correlates using automatically recorded transactions

Classification kg/m2
Underweight <18.50
Normal range 18.50−24.99
Overweight 25.00−29.99
Obesity class I 30.00−34.99
Obesity class II 35.00−39.99
Extreme obesity ≥40.00