Fig. 4
From: Upper airway lengthening caused by weight increase in obstructive sleep apnea patients
Correlations of the upper airway length LUA with a the body weight W, b the length of the long axis of tongue LLAX, c the thickness of soft tissue behind the neck TST, d the angle θ, e the angle β, and f the distance from the top of second cervical vertebra to hard palate plane h in all subjects. Solid symbols represent obstructive sleep apnea patients and hollow symbols are healthy subjects. Solid lines are the fitting results for data from all subjects. The upper and lower dashed lines in subfigure a are fitting results for patients and healthy subjects, respectively. The two vertical lines indicate the weight range with body mass index matching in patient and healthy groups