◆ Habitual/disturbing snoring; ◆ Cessation of breathing or sensation of asphyxia during sleep; ◆ Peng Yikun, Department of Otolaryngology, Guizhou Provincial People’s Hospital ◆ Unexplained daytime drowsiness/lack of sleepiness; ◆ Unexplained cardiac arrhythmia during sleep; ◆ Unexplained decreased oxygen saturation during sleep, obesity/neck circumference >1080px; ◆ Men over 40 years old; ◆ Postmenopausal women; ◆ Hypothyroidism; ◆ Cerebrovascular disease; ◆ Neuromuscular disease; ◆ Pentacameral disease; ◆ Or primary hypertension, pulmonary heart disease (unknown cause), erythrocytosis (unknown cause), headache on waking, hypogonadism, memory loss, cognitive impairment, increased nocturia (unknown cause), etc.