increases
The study, published in Sleep & Breathing, revealed that as the average oxygen saturation dropped, hematocrit increased. The low oxygen environment created by sleep apnea is a potential mechanism for elevating hematocrit and reducing oxygen, and as the oxygen decreases, the body aims to compensate for this. The body compensates in the following two ways, taking in more air, which is typically not possible in patients with OSA; and making more red blood cells to carry more oxygen