FIG. 3.

AHI over the study time course. In each panel, AHI versus study night before, during, and after high altitude exposure for the entire group (all subjects, left panel) and for subgroups of marked (middle panel) and mild desaturators (right panel), based on median split of AHI values during the first two nights at HA. *, AHI sea level versus AHI high altitude; δ, AHI high altitude first night (HA first) versus high altitude last night (HA last); μ, AHI high altitude deep desaturators versus high altitude mild desaturators. See results section, “Effect of altitude and acclimatization on sleep apnea.”