Which of the following is a risk factor for obstructive sleep apnea (OSA)?

The correct answer identifies neck size greater than 17 cm in men as a risk factor for obstructive sleep apnea (OSA). Research has shown that individuals with a larger neck circumference may have a higher propensity for soft tissue accumulation around the airways, which can lead to increased resistance and obstruction during sleep. This anatomical feature can contribute significantly to the likelihood of developing OSA, as it can narrow the airway and affect breathing patterns during sleep.

In contrast, high cholesterol is not directly considered a risk factor for OSA, although it may be associated with other cardiovascular conditions. Low heart rate is typically not associated with the risk of OSA; rather, heart rate can vary by individual activity levels and health states but does not inherently predispose someone to sleep apnea. Regular exercise is generally associated with positive health outcomes and may actually help reduce the risk of OSA by promoting overall wellness and weight management, rather than increasing the risk. Thus, recognizing neck circumference as a significant anatomical factor is crucial in understanding the risk factors associated with obstructive sleep apnea.