以暂时性听阈位移（TTS）作为观察指标。
两年后，检测每个受试者暂时性听阈位移(tts)，并调查其植物神经功能紊乱症状。
Two years later, temporary threshold shift (TTS) was measured. In the meantime the symptoms of vegetative nerve functional disturbance were inquired.
方法应用直线相关回归、逐步多元回归和协方差分析等统计学方法分析暂时性听阈位移与听阈、噪声强度、工龄、年龄等因素之间的关系。
Method Statistical methods of linear regression, multiple stepwised regression, two-way ANOVA were used to analysis the relation of TTS with audition, noise level, working-year and age.
方法应用直线相关回归、逐步多元回归和协方差分析等统计学方法分析暂时性听阈位移与听阈、噪声强度、工龄、年龄等因素之间的关系。
Method Statistical methods of linear regression, multiple stepwised regression, two-way ANOVA were used to analysis the relation of TTS with audition, noise level, working-year and age.
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