First night effect on polysomnographic sleep bruxism diagnosis varies among young subjects with different degrees of rhythmic masticatory muscle activity
First night effect on polysomnographic sleep bruxism diagnosis varies among young subjects with different degrees of rhythmic masticatory muscle activity
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DOI：
10.1016/j.sleep.2020.08.012
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发表时间：
2020-11-01
期刊：
影响因子：
4.8
通讯作者：
Kato, Takafumi
中科院分区：
文献类型：
--
作者：
Haraki, Shingo;Tsujisaka, Akiko;Kato, Takafumi
目的：探讨多导睡眠图在睡眠磨牙症(SB)诊断中的首夜效应。方法：对43例受试者(平均年龄23.7~0.32岁，范围20.0~33.0)连续两晚进行多导睡眠图监测。连续两晚对睡眠变量和节律性咀嚼肌活动(RMMA)进行评分。结果：将受试者分为对照组(n=15)、低睡眠组(n=13)和中高睡眠组(n=15)。比较三组间两晚SB诊断的一致性。睡眠变量表现出显著的首夜效应，睡眠效率较低，睡眠潜伏期较长，唤醒频率较高。仅中、高SB组的RMMA频率在第1~2晚显著增加。对照组、低SB组和中、高SB组两晚病情严重程度的符合率分别为93.3%(14/15)、76.9%(10/13)和60%(9/15)。第一晚测定病情严重程度时，对照组77.8%(14/18)、低SB组66.7%(10/15)、中高SB组90.0%(9/10)第二夜无变化。结论：RMMA发生的首夜效应随RMMA频度的不同而不同，提示由于第一夜效应，单夜多导睡眠图可能低估了Sb的中高水平，但可区分低Sb与对照组。(C)2020爱思唯尔B.V.保留所有权利。
Objective: This study investigated the first night effect on the polysomnographic diagnosis of sleep bruxism (SB).Methods: Polysomnographic recordings were performed for two consecutive nights in forty-three subjects (mean age 23.7 0.32 years [range: 20.0-33.0]). Sleep variables and rhythmic masticatory muscle activity (RMMA) were scored for two nights. The diagnosis of SB was graded by the frequency of RMMA with cut-off values of two and four times per hour of sleep.Results: Participants were classified into control (n = 15), low (n = 13) and moderate-high (n = 15) groups. Among the three groups, the concordance of the SB diagnosis was compared between the two nights. Sleep variables showed a significant first-night effect with lower sleep efficiency, longer sleep latency and higher frequency of arousals. The frequency of RMMA significantly increased from the first to the second night in the moderate-high SB group only. The concordance rate of the severity between the two nights was 93.3% (14/15) in the control group, 76.9% (10/13) in the low SB group and 60% (9/15) in the moderate-high SB group. When the severity was determined on the first night, it remained the same on the second night in 77.8% (14/18) of the control group, 66.7% (10/15) of the low SB group and 90.0% (9/ 10) of the moderate-high SB group.Conclusion: The results showed that the first night effect on the occurrence of RMMA differed among the different degrees of the RMMA frequency, and suggest that, due to the first night effect, single-night polysomnography may underestimate the moderate-high level of SB but differentiate the low level of SB from controls. (C) 2020 Elsevier B.V. All rights reserved.