Table 1.

The prevalence of complex sleep apnea syndrome

Studies	Reported year	Country	Included patients, n	Prevalence, %
Morgenthaler et al4	2006	US	233	15.0
Lehman et al29	2007	Australia	99	13.1
Dernaika et al30	2007	US	116	19.8
Endo et al33	2008	Japan	1312	5.0
Kuzniar et al34	2008	US	200	6.5
Javaheri et al35	2009	US	1286	6.5
Yaegashi et al36	2009	Japan	297	5.7
Cassel et al37	2011	Germany	675	12.2
Westhoff et al38	2012	Germany	1776	0.56