最大似然判别法对中风后遗症中医证候的计量诊断研究

Maximum Likelihood Discriminant Method for Quantitative Diagnosis in Syndromes in Apoplectic Sequela

目的:探讨中风后遗症中医证候的计量诊断规律。方法:用随机抽样方法确定调查医院,用判别分析中的最大似然判别法进行中医证候的计量诊断分析。结果:中风后遗症中医证候有阴虚血瘀证、阴虚阳亢(火热)证、气虚血瘀证、风痰阻络证。先筛选出15组47项症状因子并求出各症状因子的频数对数,再计算各证候的似然概率,根据似然概率的大小确定中医证候诊断。并对验证样本165例进行判别效果验证,其前瞻性误判概率为7.3%。结论:用最大似然判别法探讨中风后遗症中医证候计量诊断方法,有较好的实用价值。

Objective： To explore the rule of quantitative diagnosis of syndromes in apoplectic sequela. Methods： The hospitals were determined by random sampling, and quantitative diagnosis analysis of syndromes was conducted by maxium likelihood discriminant method. Results： The syndromes in apoplectic sequela included yin-asthenia and hlood-stasis, yin-asthenia and yang-hyperactivity, qi-dificiency and blood-stasis, obstruction of collateral due to wind-phlegm. Logarithm of frequence of every symptom factor was calculated, and then the likelihood possibility ratio of every syndrome, according to which the diagnosis of syndrome was determined. This method was assessed by analysis of syndromes in 165 cases, and the ratio of prospective misjudgement was 7.3%. Conclusion： Maxium likelihood discriminant method is practical in quantitative diagnosis of syndromes of apoplectic sequela.