Calculating Sensitivity, Specificity, and Agreement from Logistics Regression Model
Meir Preiszler wrote:
Hi, Assume I have a variable Y having two discrete values and two predictor variables x1 and x2. I then do a logistic regression model fit as: fit<-glm(Y~x1+x2,family=binomial). Are there functions in R than calculate the Sensitivity, Specificity , and Agreement of the model "fit"? Thanks Meir
Beware as those 3 measures are discontinuous functions of x1 and x2, requiring completely arbitrary dichtomizations, and are improper scoring rules in the statistical sense. Frank
******************************************** Meir Preiszler - Research Engineer I t a m a r M e d i c a l Ltd. Caesarea, Israel: Tel: +(972) 4 617 7000 ext 232 Fax: +(972) 4 627 5598 Cell: +(972) 54 699 9630 Email: pmeir at itamar-medical.com Web: www.Itamar-medical.com ********************************************* ----------------8<--------------------8<-------------------8<------------------- This E-mail is confidential information of Itamar medical Ltd. It may also be legally privileged. If you are not the addressee you may not copy, forward, disclose or use any part of it. If you have received this message in error, please delete it and all copies from your system and notify the sender immediately by return E-mail. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. The sender does not accept liability for any errors or omissions. Before printing this email , kindly think about the environment. Itamar Medical Ltd. MIS Yan Malgin. ----------------8<--------------------8<-------------------8<------------------- [[alternative HTML version deleted]]
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