• 5 stars = highest rating
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### OriginalStatGraphicsFormedit

 Image %LIGHTBOX{ image="survplotRMS.jpg" thumbnail="tn_survplotRMS.jpg" caption="Survival Plot" }% Click on image to enlarge. Title Basic Survival Plot Graph_Subgroup General Principles Code Added Yes Description Time to event for two treatment groups along with the number at risk located at the bottom of the figure. Contributor/Email Mat Soukup (email: Mat.Soukup@fda.hhs.gov) Background Hypothetical example used to compare the distribution of time to recovery of a cold of two treatment groups. Objective is to determine if Active drug reduces duration of a cold. Special Considerations Date Original Original Date 2007 Modified Date Use/Suitability Exploration Software Program R Software R version 2.10 R-Code - Attachment BasicSurvivalPlotTXT.txt R-Code # From Harell, 'Regression Modeling Strategies'library(Hmisc,T)library(Design,T)group <- as.factor(rep(c('Arm 1','Arm 2'), c(19,21)))
days <- c(143,164,188,188,190,192,206,209,213,216,220,227,230,
234,246,265,304,216,244,142,156,163,198,205,232,232,233,233,233,233,239,240,261,280,280,296,296,323,204,344)death <- rep(1,40)
death[c(18,19,39,40)] <- 0
units(death) <- 'Days'
S <- Surv(days, death)
f <- survfit(S~group, type='fleming')
#png('C:/Research/Graphics/Graphs4Display/webpages/classes/pages/images/survplotRMS.png',# width=500, height=500)survplot(f, conf='none', col=c('red', 'black'),n.risk=TRUE, label.curves=FALSE,lty=c(1,1), lwd=2, cex=1.5)text(x=200, y=0.4, 'Arm 1', col='red', cex=2)text(x=270, y=0.55, 'Arm 2', col='black', adj=1, cex=2)#dev.off() SAS-Code - Attachment SAS-Code Stata-Code - Attachment Stata-Code Other Code - Attachment Other Code Keywords time to event, Kaplan-Meier survival plot OPTIONAL FIELDS References Chambers, J. M., Cleveland, W. S., Kleiner, B. and Tukey, P. A. (1983) Graphical Methods for Data Analysis. Wadsworth & Brooks/Cole. Datasets Data Attached Data CATEGORIZATIONS Classification-Evaluation Efficacy Classification-Graph Type Survival Plot Graph_Type Survival Plot Variable Relationship Survival Data Types Time to Event Special Cases Disclaimer The views expressed within CTSpedia are those of the author and must not be taken to represent policy or guidance on the behalf of any organization or institution with which the author is affiliated. Permission Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF ERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT OLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Reference Image
This topic: CTSpedia > WebHome > StatGraphHome > ContributeGraphics > StatGraphTopic001
Topic revision: 30 Mar 2012, MaryBanach
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