Usefulness of Home Overnight Pulse Oximetry in Patients with Suspected Sleep-Disordered Breathing

Table 3

Receiver operating characteristic calculations using the polygraphy apnea-hypopnea index as the reference standard.

	ROC for AHI ≥ 10 AUC 95% confidence limits	ROC for AHI ≥ 30 AUC 95% confidence limits
AHI vs. ODI3	0.941 0.899–0.982	0.911 0.841–0.981
AHI vs. ODI4	0.984 0.964–1	0.922 0.859–0.986
AHI vs. T90	0.759 0.662–0.856	0.653 0.527–0.779

The best discrimination for both mild-to-moderate SAHS and severe SAHS was the ODI3 and ODI4. AHI: apnea-hypopnea index from the polygraphy; AUC: area under the curve; ODIs: mean number of oxygen desaturations ≥3% and 4% (ODI3 and ODI4) per hour of recording; T90: time spent with SpO₂ < 90%; ROC: receiver-operator characteristic.