My wife has sleep apnea and her BMI is 19. So, not necessarily.
"What is becoming increasingly clear is that we need to continue to strongly advocate weight loss for all our patients, regardless of the severity of their OSA or adherence to our other therapies. The benefits of weight loss are, to a degree, unquestionable. This study highlights that tangible benefits can be obtained with weight-loss interventions. The challenge, as always, lies in the implementation of our lofty goals."