[Retracted] An Exploratory Study on the Treatment of Obstructive Apnea-Hypopnea Syndrome by Nasal Cavity Expansion

Table 2

BMI (kg/m²) guideline.

BMI classification	WTO standards	China standard	Disease risk
Thin	<18.5	<18.5	Low
Normal	18.5∼24.9	18.5∼23.9	Average
Overweight	≥25	≥24	Increase
Little obesity	25.0∼29.9	24.0∼26.9	Increase
Obesity	30.0∼34.9	27∼29.9	Moderate increase
Severe obesity	35.0∼39.9	≥30	Severe increase