Clinical Features and Polysomnographic Findings in Greek Male Patients with Obstructive Sleep Apnea Syndrome: Differences Regarding the Age

Table 2

Polysomnographic findings in Greek male patients with OSAS.

	Young and middle age (𝑛=568,m ± SD)	Elderly (𝑛=129, m ± SD)	𝑃 value
AHI (events per hour)	35.14±13.26	33.14±12.09	NS
AHI-REM (events per hour)	30.72±9.32	28.16±7.89	NS
AHI-NREM (events per hour)	33.82±12.14	31.73±11.09	NS
Mean apnea/hypopnea duration (sec)	20.12±6.12	22.37±6.09	<0.001*
Hypoxemia duration in TST (min)	51.1±19.12	73.50±19.07	0.004*
Hypoxemia duration in REM sleep (min)	8.88±2.46	7.98±2.68	NS
Hypoxemia duration in NREM sleep (min)	28.08±5.43	42.43±6.98	0.021*
SatO2-REM	91.89±7.12	89.91±7.02	0.013*
SatO2-NREM	92.64±5.21	90.32±5.11	0.027*

AHI: apnea/hypopnea index, AHI-REM: apnea/hypopnea index in REM sleep, AHI-NREM: apnea/hypopnea index in NREM sleep, TST: total sleep time, Hypoxemia: time spent with SatO₂ <90%, in minutes. SatO₂-REM: oxyhemoglobin saturation in REM sleep. SatO₂-NREM: oxyhemoglobin saturation in NREM sleep, NS: Not significant. ^∗𝐏 < 0.05, which was considered significant.