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目的通过对慢振荡、快振荡电位诊断指标的变异系数的比较研究，明确慢、快振荡电位诊断指标的参数稳定性。方法随机选取正常志愿者30人，分别记录慢、快振荡电位，获得慢振荡电位十项诊断指标及快振荡电位三项诊断指标的均数及标准差，计算它们的变异系数。结果慢振荡电位的十项诊断指标中，以QArden的变异系数最小。快振荡电位的三项诊断指标中，P／TRatio的变异系数为6.2％，相位值的变异系数为7.0％，显著小于慢振荡电位诊断指标的变异系数。结论慢、快振荡电位的诊断指标中，比值的变异系数均较小，其中QArden、P／TRatio、相位值的变异系数为小，但比值作为诊断指标有一定的局限性，因此，相位值是一个参数稳定性较好的指标。
OBJECTIVE Through the comparative study of the coefficient of variation of the slow oscillation and fast oscillation potential diagnostic indicators, the parameter stability of slow and fast oscillation potential diagnosis indexes is clarified. Methods Thirty normal volunteers were randomly selected, and the slow and fast oscillation potentials were recorded. The mean and standard deviation of the three diagnostic indicators of slow oscillation potential and fast oscillation potential were obtained, and their coefficients of variation were calculated. Results Among the ten diagnostic indicators of slow oscillation potential, the coefficient of variation of QArden was the smallest. Among the three diagnostic indicators of fast oscillating potential, the coefficient of variation of P / TRatio was 6.2% and the coefficient of variation of phase value was 7.0%, which was significantly smaller than that of slow oscillating potential. Conclusions The coefficients of variation for the slow and fast oscillatory potentials are small, and the coefficients of variation for QArden, P / TRatio and phase are small, but the ratio has some limitations as a diagnostic indicator. Therefore, the phase value is A parameter of good stability indicators.