There is no one that is immune to sleep apnea.  However, there are some who are at risk more than others.  Here is list of factors and a brief explanation:

• Excess weight. Most but not all people with obstructive sleep apnea are overweight. Fat deposits around the upper airway may obstruct breathing. Medical conditions that are associated with obesity, such as hypothyroidism and polycystic ovary syndrome, also can cause obstructive sleep apnea.

  However, not everyone with obstructive sleep apnea is overweight and vice versa. Thin people can develop the disorder, too.

• Narrowed airway. You may inherit naturally narrow airways. Or your tonsils or adenoids may become enlarged, which can block your airway.
• High blood pressure (hypertension). Obstructive sleep apnea is relatively common in people with hypertension.
• Chronic nasal congestion. Obstructive sleep apnea occurs twice as often in those who have consistent nasal congestion at night, regardless of the cause. This may be due to narrowed airways.
• Smoking. People who smoke are more likely to have obstructive sleep apnea.
• Diabetes. Obstructive sleep apnea may be more common in people with diabetes.
• Sex. In general, men are twice as likely as premenopausal women to have obstructive sleep apnea. The frequency of obstructive sleep apnea increases in women after menopause.
• A family history of sleep apnea. If you have family members with obstructive sleep apnea, you may be at increased risk.
• Asthma. Research has found an association between asthma and the risk of obstructive sleep apnea.