Sforza E, Vandi S
Institute of Neurology, University of Bologna, Italy.
J Clin Neurophysiol. 1996 May;13(3):227-33. doi: 10.1097/00004691-199605000-00006.
We report the results of a comparison study between automatic sleep staging using the ambulatory Oxford-Medilog 9200 system and visual analysis in a group of 30 subjects. Sleep analysis was performed during the second nighttime period of each 48-h polygraphic monitoring. The automatic analysis determined a significant underestimation of total sleep time and stage 2 non-rapid eye movement (NREM) sleep and an overestimation of stage 1. No significant differences were found between the two analyses regarding slow-wave sleep and REM sleep. The differences between automatic and visual analysis of stage 2 were correlated positively with the amplitude and duration of K-complexes and negatively with the amplitude and frequency of spindles. Differences in electroencephalographic characteristics of these sleep figures were correlated negatively with age. Our results showed that (a) the Oxford-Medilog 9200 sleep staging system did not improve the scoring of stages 1 and 2 NREM sleep and (b) the degree of differences between visual and automatic analysis are related to the amplitude and frequency of sleep figures, i.e., spindles and K-complexes, used in the scoring of stage 2.
我们报告了一项针对30名受试者的比较研究结果，该研究对比了使用便携式牛津-美迪罗9200系统进行自动睡眠分期与视觉分析的情况。睡眠分析在每48小时多导睡眠监测的第二个夜间时段进行。自动分析显示总睡眠时间和2期非快速眼动（NREM）睡眠被显著低估，而1期睡眠被高估。在慢波睡眠和快速眼动睡眠方面，两种分析方法未发现显著差异。2期自动分析与视觉分析之间的差异与K复合波的幅度和持续时间呈正相关，与纺锤波的幅度和频率呈负相关。这些睡眠图形的脑电图特征差异与年龄呈负相关。我们的结果表明：（a）牛津-美迪罗9200睡眠分期系统并未改善1期和2期NREM睡眠的评分；（b）视觉分析与自动分析之间的差异程度与用于2期评分的睡眠图形（即纺锤波和K复合波）的幅度和频率有关。
