How would know if I am at risk of sleep apnea?

Apnea risk. The biggest risk for sleep apnea is either being a man or post menopausal female. Other risk factors include obesity, age greater than 50, a neck size greater than 16 inches, and having a crowded airway.
Neck size BMI. Two of the most telling factors that may indicate increased risk for sleep apnea is neck size of greater than 15 and 17 for women and men along with a bmi of 30 or greater.