Furthermore, OSA could also be resolved when weight was reduced (Maniscalco et al., 2008, Shore, 2008). This was attributed to obese people having a narrower airway due to the external soft tissue enlargement that would collapse more easily and thus would be more prone to airway obstruction (Fleetham, 1992). With weight loss and thus a modification of the anatomy, there could be an improved function of the airway (Suratt et al. 1987)