利用水中尸体腐败程度评分推断死后淹没时间

Aquatic Decomposition Scoring Estimating Postmortem Submersion Interval

目的 探索一种水中尸体腐败程度评分方法,并评价该方法推断死后淹没时间(postmortem submersion interval,PMSI)的效果。方法 收集本单位近年来已知死亡时间的水中尸体案例(共 65 具),设计新的适用水中尸体的腐败程度评分系统,对每例尸体照片分别进行腐败程度评分,得出总体水中尸体腐败分值(total aquatic decomposition score,TADS),利用统计学方法研究 TADS 与 PMSI 的关系,并建立回归方程。结果 水中尸体 PMSI 与 TADS 呈正相关(R^(2)=0.63,P<0.001),建立回归方程:lgPMSI=0.191+0.045TADS(R^(2)=0.668,P<0.001)。结论 水中尸体腐败程度评分是有效推断死后淹没时间的方法之一。

Objective To explore a method for aquatic decomposition scoring to estimate postmortem submersion interval( PMSI) and have its effect evaluated. Methods PMSI-known totaling 65 cases were collected from our past work in recent years, having each case obtained of its total aquatic decomposition score(TADS) with a new designed decomposition scoring algorithm. The relationship was explored between TADS and PMSI through statistical approach, rendering a regression equation. Results PMSI was positively correlated with TADS(R^(2)=0.63, P<0.001). With log conversion of PMSI, the regression equation was established as lgPMSI=0.191+0.045TADS(R^(2)=0.668, P<0.001). Conclusion Aquatic decomposition scoring is capable of effectively estimating PMSI.