共查询到14条相似文献,搜索用时 156 毫秒
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目的 本发展了广义Ad-Logistic回归模型理论。方法 可同时实现病例与对照间“是否发病”,及不同发病年龄病例间“发病早晚”的比较分析,较为客观地评价危险因素的病因学和发病学研究意义。结果 通过实际应用,与现有方法进行对比。 相似文献
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本文提出了状态和约化关联矩阵算法技巧,是状态风险分析理论的重要基础,实现了平庸态约化,有效信息提取,及状态与变量回归参数间的转换。文中对Epi FASRS统计软件与SAS软件中,相关程序的分析功能和结果进行了比较。 相似文献
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借助模糊状态概念、交叉积差和统计量和信息量寻优标准,转好实现最佳非饱和模型拟合与归因危险度估计,突破了传统谱系套模型限定的约束,能找出显著交互效应项,有助于揭示微弱相关影响因素的多因素联合作用。 相似文献
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本文对125例宫颈鱗癌病人,按1:1配对进行了病例对照研究。单因素分析,从39个研究因素中初筛出14个可疑危险因素、条件Logistic回归分析,筛选出5个危险因素:宫颈糜烂、系庭经济状况、经期卫生评分、性因素和初婚年龄。通径分析结果表明,宫颈糜烂,不常洗外阴、平时就诊医院和初婚年龄4因素对宫颈癌的发生有直接作用;初婚年龄、月经垫不洁、配偶包皮过长和家庭经济状况4因素通过各自的中间环节起间接作用。 相似文献
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Research has suggested that recurrent maltreatment may be best predicted by a combination of factors that vary across families.
The present study set out to determine whether a pattern-centered analytic approach would better predict families at high
risk for recurrence when compared to logistic regression methods. Archival data from substantiated investigations during 2003
were collected from a Connecticut Department of Children and Families county branch. Families (n = 244) with a substantiated index case were followed for 18 months to identify the presence of additional substantiated cases
within the CPS system. Classification and Regression Tree (CART) analyses revealed that prior CPS involvement was the best
predictor of recurrent maltreatment. Further, risk items that were associated with recurrence were different for families
with and without previous CPS investigations. Families with only prior unsubstantiated CPS investigations and poor child visibility within the community were at high risk for recurrence. Families without prior CPS involvement that
were not actively involved in case planning and had a history of domestic violence were at high risk for recurrence. These findings suggest that pattern-centered analyses
may be a useful approach to informing site-specific predictors of maltreatment recurrence by creating clear decision points
that delineate high risk subgroups. 相似文献