Table 1.

Prevalence of insomnia symptoms in patients with OSA.

Source, year	Population	Agea	Sexb	Prevalence of insomnia symptoms
Smith et al., 200612	102 patients diagnosed with OSA at sleep clinic	53.91 ± 13.67, 18-87	69.5	39% of patients with OSA met criteria for insomniac
Chung et al., 20056	157 patients diagnosed with OSA by PSG	44.5 ± 9.6	93	42% reported at least 1 insomnia symptomd
Krell et al., 200510	228 patients diagnosed with SDB by PSG	47, 20-85	60.4	54.9% reported 1 of 3 insomnia complaintsd
Krakow et al., 20019	231 patients diagnosed with SDB at sleep disorders center	51, 19-79	68.8	50% reported 2 of 3 insomnia complaintse

OSA refers to obstructive sleep apnea; SDB, sleep disordered breathing; PSG, polysomnography.

^aData are presented as mean ± SD, range;

^bData are presented as the percentage of men;

^cCriteria for insomnia included an Insomnia Severity Index ≥ 15, sleep-onset latency (SOL) or wake time after sleep onset > 30 min from polysomnography (PSG), and at least 1 daytime consequence;

^dInsomnia symptoms or complaints included sleep-maintenance insomnia, sleep-onset insomnia, or early morning awakenings;

^eInsomnia complaints included SOL > 30 minutes, wake up a lot, or difficulty returning to sleep once awakened.