健康年轻女性睡眠期间酒精摄入量与咬肌活动水平之间的关联。

Association between the amount of alcohol intake and masseter muscle activity levels recorded during sleep in healthy young women.

作者信息

Hojo Akimitsu, Haketa Tadasu, Baba Kazuyoshi, Igarashi Yoshimasa

机构信息

Removable Prosthodontics, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.

出版信息

Int J Prosthodont. 2007 May-Jun;20(3):251-5.

PMID:17580455

Abstract

PURPOSE

The aim of this study was to determine if the amount of alcohol intake is associated with masseter muscle activity recorded during sleep.

MATERIALS AND METHODS

Sixty healthy young female subjects (average age, 23.0 +/- 1.9 years; range, 21 to 32 years) participated in the study. Subjects were asked to perform 6 consecutive nightly masseter electromyography (EMG) recordings by using a portable EMG recording system in their homes. Using a minimum threshold criterion, which was set at 20% of the maximum voluntary contraction level, the total duration of muscle activity per hour of sleep was calculated. EMG data obtained on the first night were excluded from the analysis to avoid the first-night effect, and the data of the remaining 5 nights were averaged. Further, the subjects were asked to fill out questionnaires regarding their daily alcohol intake during the recording period. The total ethanol content of the consumed alcohol was calculated using a standard conversion table for alcoholic beverages. The ethanol concentration of each type of alcohol was multiplied by the reported amount consumed on each day, and the average value for 5 days was calculated. The EMG data were considered as a dependent variable, while the alcohol data were considered as an independent variable. Linear regression analysis was used to assess a possible association between these variables.

RESULTS

The subjects who did not consume alcohol during the recording period (n = 28) or who provided incomplete data sets as a result of missing data (n = 9) were excluded. The data of the remaining 23 subjects (n = 23) were exclusively analyzed. The result of this analysis revealed that the total ethanol content of the consumed alcohol was significantly and positively related to the EMG duration variable (coefficient = 0.51, 95% confidence interval: 0.20 to 0.82, adjusted R2 = 0.33, P < .01).

CONCLUSION

The results suggest that the amount of alcohol intake is substantially associated with masseter muscle activity levels during sleep in young women.

摘要

目的

本研究旨在确定酒精摄入量是否与睡眠期间记录的咬肌活动有关。

材料与方法

60名健康年轻女性受试者（平均年龄23.0±1.9岁；范围21至32岁）参与了本研究。受试者被要求在家中使用便携式肌电图（EMG）记录系统连续6个晚上进行咬肌肌电图记录。使用设定为最大自主收缩水平20%的最小阈值标准，计算每小时睡眠期间肌肉活动的总持续时间。为避免首夜效应，将第一晚获得的EMG数据排除在分析之外，并对其余5晚的数据进行平均。此外，要求受试者填写关于记录期间每日酒精摄入量的问卷。使用酒精饮料标准换算表计算所摄入酒精的总乙醇含量。将每种酒精的乙醇浓度乘以报告的每日摄入量，并计算5天的平均值。将EMG数据视为因变量，而将酒精数据视为自变量。使用线性回归分析评估这些变量之间可能的关联。

结果

排除记录期间未饮酒的受试者（n = 28）或因数据缺失而提供不完整数据集的受试者（n = 9）。仅对其余23名受试者（n = 23）的数据进行分析。该分析结果显示，所摄入酒精的总乙醇含量与EMG持续时间变量显著正相关（系数 = 0.51，95%置信区间：0.20至0.82，调整后R2 = 0.33，P <.01）。