Gutjahr L, Künkel H, Machleidt W
Arzneimittelforschung. 1978;28(10a):1857-61.
A series of electroencephalographic features were measured for about 11,500 patients from a clinical population, over a period of five years (1972 to 1976) and were documented using a standarized procedure. It could be shown that for males a definite yearly rhythm was present for the relative frequencies of alpha-type, partial beta-type, and low voltage EEGs, as well as for continuous and grouped dysrhythmias, the amplitudes of which were in the main 20--30% of the average. For females on the other hand, apart from grouped dysrhythmias, no such yearly rhythms could be proven, at the most such with a periodicity of between 14 and 16 months. The data often display trends that are more distinct than the rhythmicity and as such these should be taken into consideration when deciding upon the model used for statistical regression.
在五年期间（1972年至1976年），对约11500名临床患者的一系列脑电图特征进行了测量，并采用标准化程序进行记录。结果表明，对于男性，α型、部分β型和低电压脑电图的相对频率以及连续性和成群性心律失常存在明确的年度节律，其振幅主要为平均值的20%至30%。另一方面，对于女性，除成群性心律失常外，未证实存在此类年度节律，最多只有周期为14至16个月的节律。数据常常显示出比节律性更明显的趋势，因此在决定用于统计回归的模型时应考虑这些趋势。
