Which statement concerning polycythemia vera is true?

Question

Quizplus · Accepted Answer

The cause of polycythemia vera is unknown. It is somewhat more common in men than in women, and the age of onset is usually between 40 and 60 years of age. Symptoms include headache, dizziness, and itching. Pulmonary disease, heart disease, living at high altitudes, and an elevation in carbon monoxide are all associated with secondary polycythemia rather than polycythemia vera. Causes of acute relative polycythemia rather than polycythemia vera include use of diuretics, vomiting, diarrhea, and excessive sweating. Polycythemia vera is somewhat more common in men than in women, and the age of onset is usually between 40 and 60 years of age.

Which Statement Concerning Polycythemia Vera Is True