Table 1. Symptoms, clinical risk factors and populations at high risk for obstructive sleep apnea.

Populations at high risk for OSA	History and symptoms prompting sleep evaluation by PSG
History of Stroke	Daytime sleepiness
Obesity (BMI > 30)*	Loud and habitual snoring
Congestive heart failure	History of hypertension
Atrial fibrillation	Gasping/choking at night
Refractory hypertension	Witnessed apneas
Type 2 diabetes	Decreased concentration
Nocturnal dysrhythmias	Frequent awakenings
Non-dipping BP	Memory loss

BMI: body mass index; BP: blood pressure.