Park Y M, Matsumoto K, Seo Y J, Shinkoda H, Park K P
Graduate School, University of East Asia, Shimonoseki, Japan.
Psychiatry Clin Neurosci. 1998 Apr;52(2):245-6. doi: 10.1111/j.1440-1819.1998.tb01055.x.
The Morningness-Eveningness Questionnaire and Life Habits Inventory were given to Korean and Japanese workers. The distributions of scores on the questionnaire for these two groups were normal and its mean slightly moved to the Morning type with aging. It is noteworthy, however, that the mean scores of Korean workers was lower than those of the Japanese workers. The self-reported waking times and bedtimes for the two groups gradually became earlier with aging. From these results it could be said that aging was an factor that led to the difference of circadian phase.
对韩国和日本工人进行了晨型-夜型问卷和生活习惯量表调查。这两组在问卷上的得分分布呈正态分布，且随着年龄增长，其平均值略微向晨型移动。然而，值得注意的是，韩国工人的平均得分低于日本工人。两组自我报告的起床时间和就寝时间都随着年龄增长而逐渐提前。从这些结果可以看出，年龄是导致昼夜节律相位差异的一个因素。
