The practical nurse (PN) is caring for a client with obstructive sleep apnea (OSA). The PN should recognize the client is at greater risk for the development of which complication?

A. Hypothyroidism: Not directly caused by OSA; unrelated endocrine disorder. B. Peptic ulcer disease: No established causal link with OSA. C. Hypertension: Repeated hypoxia and arousals during sleep increase sympathetic activity, raising blood pressure and risk for hypertension. D. Fibromyalgia: Not a direct complication of OSA, although poor sleep can exacerbate pain.