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Consistency of respiratory measurements from night to night during the sleep of elderly men. FREE TO VIEW

W R Aber; A J Block; D W Hellard; W B Webb
Chest. 1989;96(4):747-751. doi:10.1378/chest.96.4.747
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Fourteen healthy elderly men had polysomnography performed on two consecutive nights to assess the consistency of sleep and breathing from night to night. The reported first-night effect was seen on electroencephalographic sleep, leading to lighter or fitful sleep on the first night. Mean values for apneas, hypopneas, and oxygen desaturations did not change from night 1 to night 2. Five of 14 subjects would have changed classification from night to night if a cutoff of five apneas and hypopneas per hour were used to define normality. Because this numerical cutoff may not be valid in the elderly, the clinical significance of such a changing classification is not clear.




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