作者marki (marki)
看板Statistics
标题[问题] 想请问probability的问题
时间Thu Aug 20 15:06:30 2020
各位前辈好
小弟想请问在这篇文章的fig 5
pubmed:
https://pubmed.ncbi.nlm.nih.gov/24814497/
全文:
https://www.sciencedirect.com/science/article/pii/S0735109714022189?via%3Dihub
fig 5 连结:
https://www.onlinejacc.org/content/63/25_Part_A/2840/F5
是怎麽画出来的
我了解这应该是先做出logistic regression模型 然後在算出probability
内文是写:
....AF burden was significantly associated with the clinical AF
classification and was included in subsequent models investigating
the additional effect of the following variables on the clinical AF
classification: age, sex, presence of coronary artery disease, presence
of cardiomyopathy, functional status (New York Heart Association
functional class), history of ablation for AF, history of heart surgery,
AF density (6,18), and left ventricular ejection fraction (LVEF)....
(p. 2842 左上 Statistical analyses段落)
我的疑问是所以在计算probability的时候,他的age, sex, presence of coronary artery disease等调整变数要放甚麽阿?
是都当作0吗?
烦请各位先进不吝指教
感谢
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※ 文章网址: https://webptt.com/cn.aspx?n=bbs/Statistics/M.1597907194.A.B83.html
※ 编辑: marki (140.116.253.195 台湾), 08/20/2020 15:56:43
1F:→ andrew43: 若预先中心化连续自变数,那填0是合理的做法,也就是把 08/20 17:41
2F:→ andrew43: 其它自变数填入其平均的意思。这张图应该也是忽略其它自 08/20 17:42
3F:→ andrew43: 变数(视为定值)。 08/20 17:44
4F:→ andrew43: 类别自变数的话也可采用特定contrast coding达到此目的 08/20 17:44
5F:→ marki: 可是例如年纪。这个平均值不是0。所以意思是要放平均值吗? 08/20 22:15
6F:→ marki: 另外是这个method 习惯上是都不会写吗? 08/20 22:16
7F:→ clickhere: subsequent model"s". Fig 5 可能只多了LVEF&CAD. 08/21 07:52