Table 6.

Spearman correlation of polysomnography parameters with McGill oximetry score.

Polysomnography Parameter	Median (IQR)	Correlation with MOS Spearman Coefficient (95% CI)	P
Apnea-hypopnea index, events/h	9.7 (4.2, 16.2)	0.43 (0.26, 0.57)	< .001
Obstructive apnea-hypopnea index, events/h	3.6 (0.1, 10.6)	0.30 (0.12, 0.46)	.002
Central apnea-hypopnea index, events/h	3.1 (1.2, 7.2)	0.19 (–0.01, 0.36)	.06
Oxygen saturation nadir, %	84.0 (80.0, 90.0)	–0.73 (–0.80, –0.62)	< .001
Baseline mean oxygen saturation asleep, %	97.0 (96.5, 98.0)	–0.20 (–0.38, –0.01)	.04
CT90, %	0.1 (0.0, 0.4)	0.85 (0.79, 0.90)	< .001
Oxygen desaturation index, events/h	6.2 (2.2, 13.3)	0.61 (0.47, 0.71)	< .001

CI = confidence interval, CT90 = cumulative time percentage with oxygen saturation less than 90%, IQR = interquartile range, MOS = McGill oximetry score.