A standard procedure enhances the correlation between subjective and objective measures of sleepiness.
A standard procedure enhances the correlation between subjective and objective measures of sleepiness.
复制标题
标准程序增强了主观和客观睡意测量之间的相关性。
作者：
Chien;Fung;A. Spielman
目的
本研究的目的是评估在主观评价嗜睡之前制定标准程序以最大限度地减少短暂激活是否可以提高评价过程的预测值。
方法
30名19至26岁的年轻人参加了这项研究。在家里睡觉，就寝时间限制在5小时之后，他们来到睡眠实验室。他们被指示根据斯坦福大学嗜睡量表（SSS）和视觉模拟量表（VAS）对他们的嗜睡水平进行评分。在对一半受试者（实验组）进行嗜睡评级之前，对另一半受试者（对照组）进行“平静”程序，即安静地坐着，闭上眼睛1分钟，但不对另一半受试者（对照组）进行。然后进行多导睡眠图记录的午睡试验，然后进行警惕性测试。
结果
对于实验组，“嗜睡”和“警觉性”的VAS结果均与午睡期间的睡眠起始潜伏期（SOL：r = -.62和.64，P值< .05）和警觉测试的反应时间（RT）（r = .56和-.54，P值< .05）显著相关。SSS评分与小睡SOL（r =-0.58，P <0.05）显著相关，但与警觉性测试中的RT（r = 0.19，P = 0.52）无关。对于对照组，没有一个主观评分显示出与客观测量的显著相关性。对于两组相关性：“警觉性”VAS与午睡SOL之间的相关性以及“嗜睡”VAS与警觉性测试RT之间的相关性，两组所得相关性之间的差异具有统计学显著性。
结论
结果表明，主观评级的嗜睡状态的个人与轻度睡眠限制更忠实地反映了生理倾向，入睡以及认知注意力时，进行评级后，坐着不动，闭上眼睛足够的时间，以尽量减少瞬态激活。
OBJECTIVE
The goal of this study was to assess whether instituting a standard procedure to minimize transient activation prior to the subjective rating of sleepiness can improve the predictive value of the rating process.
METHODS
Thirty young adults, aged 19 to 26 years, participated in the study. Subsequent to sleeping at home with bedtime restricted to 5 hours, they came to the sleep laboratory. They were instructed to rate their level of sleepiness on the Stanford Sleepiness Scale (SSS) and visual analog scales (VAS). A "calm-down" procedure, sitting quietly with eyes closed for 1 minute, was instituted prior to sleepiness ratings for half of the subjects (experimental group) but not for the other half of the subjects (control group). A nap trial with polysomnographic recording was then conducted, followed by a vigilance test.
RESULTS
For the experimental group, VAS results of "sleepiness" and "alertness" both correlated significantly with sleep-onset latency during the nap (SOL: r = -.62 and .64, respectively, P values < .05) and with reaction time (RT) on the vigilance test (r = .56 and -.54, P values < .05). The SSS ratings showed significant correlation with nap SOL (r = -.58, P < .05) but not with RT on the vigilance test (r = .19, p = .52). For the control group, none of the subjective ratings showed significant correlation with objective measures. The differences between the resultant correlations for the 2 groups were statistically significant for 2 sets of correlations: the correlation between VAS of "alertness" and nap SOL and the correlation between VAS of "sleepiness" and RT on the vigilance test.
CONCLUSION
The results indicate that the subjective ratings of the sleepiness state for individuals with mild sleep restriction more faithfully reflect a physiologic tendency to fall asleep as well as cognitive attentiveness when the ratings are conducted subsequent to sitting still with eyes closed for a sufficient time to minimize transient activation.