作者Qwteru (无名)
看板Statistics
标题[问题] 想请教各位大大，什麽是structural equation model,SEM
时间Wed Jun 14 22:08:13 2006
如题，看到paper上有用到structural equation model,好像缩写是SEM.不知道在说啥也@@~
好像还有提到 Factor analysis 及 The predictive validity ~~><""都不太了
不知道各位大大知道吗，还是有什麽入门书之类可以介绍给小的^^""
谢谢~~~
以下是文章的全文
Factor analysis may be used to determine the
total imprecision—the combination of laboratory
imprecision and preanalytical variation—
of each biomarker (Budtz-Jorgensen et al.2003).
The predictive validity of the biomarkers
may also be assessed from their associations
with known outcome variables (Grandjeanet al. 1999).
An extended analysis can be carried out
using a structural equation model,
where confounders and effect variables are included
这里指的biomarker可以当作一个受污染程度的指标，而
outcome variable则可想作污染後的结果，
confounder指的是其他的因子造成相同的污染结果，非预期的
此一段我猜应该是要来利用统计来计算
biomarker与outcome variable之间的相关性。
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