Fig. 2
Distribution of the nutritional status classification according to the body mass index (BMI), for each age group. *Chi-square test at the 5% significance level. Nutritional status classification for adolescents: underweight = BMI for age < − 2SD; normal = −2SD ≥ BMI for age ≤ 1SD; overweight = 1SD ≥ BMI for age ≤ 2SD; obesity = BMI for age > 2SD [5]. Nutritional status classification for young adults: underweight = BMI < 18.5 kg/m2; normal = BMI between 18.5 and 24.9 kg/m2; overweight = BMI between 25 and 29.9 kg/m2; obesity = BMI ≥ 30.0 kg/m2 [6]