Clinical and polysomnographic characteristics in elderly patients with obstructive sleep apnea hypopnea syndrome / 中华老年医学杂志

ABSTRACT

Objective To investigate the clinical and pdysomnographic characteristics and related factors of obstructive sleep apnea hypopnea syndrome (OSAHS) in elderly patients. Methods The 163 elderly patients with OSAHS confirmed by polysomnography were classified into obesity group and non-obesity group according to body mass index (BMI). All cases were grouped into mild,moderate and severe groups according to the apnea hypopnea index (AHI) and night SaO2. The 190non-elderly OSAHS patients were as control group at the same time. The clinical and polysomnographic characteristics were recorded and analyzed. Results (1)The proportion of obesity in OSAHS patients was 79. 1%, there was significant difference between the elderly-obesity group and non-elderly-obesity group (70.3% vs. 83.6%, P＜0.05). (2)The proportions of moderate and severe OSAHS patients were lower in elderly group than in non-elderly group. There were significant differences in AHI, the lowest arterial O2 saturation (LSaO2) and % TRT SaO2 ＜90% between the two groups (all P＜0.05). (3)The sleep architecture disturbance was significantly severer in elderly group than in non-elderly group. The percentages of non-rapid eye movementsleep (NREM sleep)stage Ⅲ-Ⅳ sleep were significantly decreased, and the arousal was significantly increased. (4) The syndrome of OSAHS in elderly group was untypical and the clinical complication was increased.Conclusions The elderly OSAHS patients are less severe than non-elderly group, but the elderly patients have worse sleep architecture disturbance and more complications such as hypertension and other cardiovascular diseases.