Which symptom indicates a high risk for obstructive sleep apnea?

Obesity, specifically with a Body Mass Index (BMI) greater than 35, is a significant risk factor for obstructive sleep apnea (OSA). Excess body weight, particularly around the neck, can lead to the relaxation of the muscles in the throat during sleep, which narrows or closes the airway, causing interruptions in breathing. This condition is characterized by snoring, gasping, and frequent awakenings throughout the night. The relationship between obesity and sleep apnea is well-established in clinical research, making it a reliable indicator for assessing risk.

The other options do not present the same level of association with obstructive sleep apnea. Low alcohol consumption and regular exercise typically contribute to overall health improvements, which help mitigate various health risks, including sleep apnea. Furthermore, being under 30 years of age often correlates with lower obesity rates, and while age can be a contributing factor when considering the overall risk for OSA, it is not as directly related as obesity. Thus, a BMI greater than 35 is clearly recognized as a critical marker for identifying individuals at high risk for developing obstructive sleep apnea.