Question: what are the risk factors for obstructive sleep apnea?
Answer: Excess weight. Most but not all people with obstructive sleep apnea are overweight. ... 
Narrowed airway. ... 
High blood pressure (hypertension). ... 
Chronic nasal congestion. ... 
Smoking. ... 
Diabetes. ... 
Sex. ... 
A family history of sleep apnea.