为了检测和量化随时间推移而发生的变化，我们采用了Poisson回归分析法，并对道路伤害的趋势和季节性以及驾照扣分制度的有无进行了调整。
To detect and quantify changes over time we used Poisson regression, with adjustments for trend and seasonality in road injuries and the existence of a driver's licence penalty point system.
方法 用季节预测法中的移动平均比率法计算趋势值与调整月指数 ，最后应用模型。
Methods The trend values were calculated and the monthly indexes were adjusted with moving average method of season prediction method, and then the model was applied.
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