Dear R users, I am a new R user and something stops me when I try to write a academic article. I want to make a nomogram to predict the risk of prostate cancer (PCa) using several factors which have been selected from the Logistic regression run under the SPSS. Always, a calibration plot is needed to validate the prediction accuracy of the nomogram. However, I tried many times and read a lot of posts with respect to this topic but I still couldn't figure out how to draw the nomogram and the calibration plot. My dataset and questions in detail are shown in two attached files. It will be very grateful if someone can save his/her time to help for my questions. Warmest regards! Ping Tang http://r.789695.n4.nabble.com/file/n3710068/Dataset.xls Dataset.xls http://r.789695.n4.nabble.com/file/n3710068/R_help.doc R_help.doc -- View this message in context: http://r.789695.n4.nabble.com/How-to-make-a-nomogam-and-Calibration-plot-tp3710068p3710068.html Sent from the R help mailing list archive at Nabble.com.
Kindly do not attach questions in a separate document. Install and read the documentation for the R rms package, and see handouts at http://biostat.mc.vanderbilt.edu/rms Frank sytangping wrote:> > Dear R users, > > I am a new R user and something stops me when I try to write a academic > article. I want to make a nomogram to predict the risk of prostate cancer > (PCa) using several factors which have been selected from the Logistic > regression run under the SPSS. Always, a calibration plot is needed to > validate the prediction accuracy of the nomogram. > However, I tried many times and read a lot of posts with respect to this > topic but I still couldn't figure out how to draw the nomogram and the > calibration plot. My dataset and questions in detail are shown in two > attached files. It will be very grateful if someone can save his/her time > to help for my questions. > > Warmest regards! > > Ping Tang http://r.789695.n4.nabble.com/file/n3710068/Dataset.xls > Dataset.xls http://r.789695.n4.nabble.com/file/n3710068/R_help.doc > R_help.doc >----- Frank Harrell Department of Biostatistics, Vanderbilt University -- View this message in context: http://r.789695.n4.nabble.com/How-to-make-a-nomogam-and-Calibration-plot-tp3710068p3710126.html Sent from the R help mailing list archive at Nabble.com.
Nomogram is user-friendly, but the equation is also acceptable. It should be kept in mind that the process of model development really counts. BTW: You can calculate C-index (AUC) in SPSS. Calibration plot can also be plotted (may be manually) from the result of SPSS. *Yao Zhu* *Department of Urology Fudan University Shanghai Cancer Center Shanghai, China* 2011/8/1 sytangping <surgeon666666@yahoo.com.cn>> Dear R users, > > I am a new R user and something stops me when I try to write a academic > article. I want to make a nomogram to predict the risk of prostate cancer > (PCa) using several factors which have been selected from the Logistic > regression run under the SPSS. Always, a calibration plot is needed to > validate the prediction accuracy of the nomogram. > However, I tried many times and read a lot of posts with respect to this > topic but I still couldn't figure out how to draw the nomogram and the > calibration plot. My dataset and questions in detail are shown in two > attached files. It will be very grateful if someone can save his/her time > to > help for my questions. > > Warmest regards! > > Ping Tang http://r.789695.n4.nabble.com/file/n3710068/Dataset.xls > Dataset.xls http://r.789695.n4.nabble.com/file/n3710068/R_help.doc > R_help.doc > > -- > View this message in context: > http://r.789695.n4.nabble.com/How-to-make-a-nomogam-and-Calibration-plot-tp3710068p3710068.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >[[alternative HTML version deleted]]