Role of Obesity in Asthma Control, the Obesity-Asthma Phenotype

Table 1

WHO body mass index (BMI) Classification [1].

Classification	BMI (kg/m²)	Risk of comorbidities
Underweight	<18.5	Low (but risk of other clinical problems increased)
Normal range	18.5–24.9	Average
Overweight; (preobese)	25.0–29.9	Mildly increased
Obese	≥30.0
Class 1	30.0–34.9	Moderate
Class 11	35.0–39.9	Severe
Class 111	≥40.0	Very severe