. Author manuscript; available in PMC: 2010 Oct 27.

Published in final edited form as: J Am Coll Cardiol. 2009 Oct 27;54(18):1706–1712. doi: 10.1016/j.jacc.2009.08.016

Table 2.

Sleep study results of patients with mild sleep apnea at baseline (mild sleep apnea) and those with severe sleep apnea without (night 2) and with (night 3) oxygen supplementation

	Mild Sleep Apnea	Severe Sleep Apnea night 2	Severe Sleep Apnea night 3 (with O₂)
Total AHI	16 ± 8	66 ± 31	48 ± 18^*
% Obstructive Apneas	93 ± 8	57 ± 37	74 ± 34^*
% Central Apneas	2.2 ± 1.8	18 ± 25	15 ± 27
% Mixed Apneas	4.3 ± 7.4	26 ± 22	11 ± 14^*
Total Arousal Index (n/hr)	13 ± 8	47 ± 23	39 ± 21
T90 (%)	0.49 ± 0.60	15.2 ± 19.6	1.7 ± 3.6^*
Baseline SaO₂	96.9 ± 1.4	96.0 ± 2.0	98.1 ± 0.8^*
Avg Low SaO₂ (%)	93.6 ± 2.0	88.9 ± 4.4	94.7 ± 2.4^*
Baseline log BNP	3.5 ± 2.1	3.6 ± 2.6	4.5 ± 1.3
Mean log BNP	3.9 ± 1.3	3.5 ± 2.5	4.5 ± 1.4

p < 0.05 night 3 v. night 2. Note that patients in the mild sleep apnea group had mild or no sleep apnea on the baseline study, but may have had mild to moderate sleep apnea on the subsequent study. Mean log BNP refers to the mean of all samples obtained through the night.