Table 3.

Univariate correlations between the apnea-hypopnea index, the mean minimal oxygen saturation and clinical characteristics or measurements

	AHI		Mean minimal SO2
	r	P-value	r	P-value
Age	−0.07	0.66	−0.1	0.56
Body mass index	−0.03	0.82	0.18	0.29
Glomerular filtration rate	−0.39	0.007	−0.22	0.31
Mean arterial pressure	−0.2	0.2	0.26	0.14
ES log	−0.09	0.53	−0.08	0.63
NTproBNP	0.53	0.003	−0.22	0.31
Ejection fraction	−0.09	0.55	0.06	0.74
AVA/echocardiography	−0.15	0.31	0.04	0.82
dPmax	−0.19	0.22	0.05	0.82
dPmean	−0.16	0.28	−0.01	0.1
Systolic PA pressure	0.13	0.45	0.17	0.38
Cardiac index	0.05	0.75	0.18	0.3

Notes: Data in bold indicates statistical significance.

Abbreviations: AHI, apnea–hypopnea index; AVA, aortic valve area; ES log, logarithmic EuroSCORE; PA, pulmonary artery; EuroSCORE, European System for Cardiac Operative Risk Evaluation; NTproBNP, N-terminal of the prohormone brain natriuretic peptide; SO₂, arterial oxygen saturation; dP_max, maximal systolic pressure gradient between left ventricle and aorta ascendens; dp_mean, mean systolic pressure gradient between left ventricle and aorta ascendens.