Figure 1. Respiratory parameters from PSG and HSAT in the 73 individuals with diagnostic sleep study data.

(A) Both AHI and REI were derived with use of 4% hypopnea scoring criteria to harmonize between data extracted from HSAT and in-lab PSG. (B) Minimum SpO₂ (%). (C) Time with SpO₂ < 88% (minutes). (D) Mean SpO₂ (%). AHI = apnea-hypopnea index, HSAT = home sleep apnea test, PSG = polysomnography, REI = respiratory event index, SpO₂ = oxygen saturation.