Table 2.

Diagnostic Polysomnography

Variables	CSA-CPAP n=13	noCSA-CPAP n=86	p-value
AHI, events per hr	72.1 ± 32.0	52.7 ± 28.1	0.02
Arl, events/hr	42.3 ± 20.8	29.2 ±16.1	<0.01
MAI, events/hr	6.8 ± 19.7	1.3 ±5.1	0.03
CAI, events/hr	12.4 ± 23.9	1.2 ± 2.3	<0.01
No of subjects with CSA (proportion of group with CSA)
	6 (46%)	7 (8%)	<0.01

Abbreviations: AHI: apnea-hypopnea index, ArI: arousal index, MAI: mixed apnea index, CAI: central apnea index.