Difference between revisions of "Survival Analysis Using Kaplan-Meier"
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Revision as of 10:45, 22 January 2007
<pre> /* January 2007. Annie Che <chea@stat.ucla.edu>. UCLA Statistics. reference for example data and formula: Modern Applied Statistics with S. Fourth Edition by W. N. Venables and B. D. Ripley Note that the first method of hazard calculation is used here (see reference for details). */ package edu.ucla.stat.SOCR.analyses.example; import java.util.HashMap; import edu.ucla.stat.SOCR.analyses.data.Data; import edu.ucla.stat.SOCR.analyses.data.DataType; import edu.ucla.stat.SOCR.analyses.result.SurvivalResult; public class SurvivalKaplanMeierExample { public static void main(String args[]) { double[] time = {1,10,22,7,3,32,12,23,8,22,17,6,2,16,11,34,8,32,12,25,2,11,5,20,4,19,15,6,8,17,23,35,5,6,11,13,4,9,1,6,8,10}; byte[] censor = {1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,0,1,0,1,0,1,0,1,0,1,0,1,1,1,0,1,0,1,1,1,1,1,0,1,0,1,0}; String[] treat = {"control","6-MP","control","6-MP","control","6-MP","control","6-MP", "control","6-MP","control","6-MP","control","6-MP","control","6-MP","control","6-MP", "control","6-MP","control","6-MP","control","6-MP","control","6-MP","control","6-MP", "control","6-MP","control","6-MP","control","6-MP","control","6-MP","control","6-MP", "control","6-MP","control","6-MP"}; try { Data data = new Data(); SurvivalResult result = (SurvivalResult)data.getSurvivalResult(time, censor, treat); double[][] survivalTimeArray = result.getSurvivalTime(); double[][] survivalRateArray = result.getSurvivalRate(); double[][] upperCIArray = result.getSurvivalUpperCI(); double[][] lowerCIArray = result.getSurvivalLowerCI(); int[][] atRiskArray = result.getSurvivalAtRisk(); double[][] survivalSEArray = result.getSurvivalSE(); String timeList = result.getSurvivalTimeList();; double[][] survivalTime = result.getSurvivalTime(); double[][] survivalRate = result.getSurvivalRate(); double[][] upperCI = result.getSurvivalUpperCI();; double[][] lowerCI = result.getSurvivalLowerCI(); double[][] survivalSE = result.getSurvivalSE(); double[][] censoredTime = result.getCensoredTimeArray();; double[][] censoredRate = result.getCensoredRateArray(); double[] maxTime = result.getMaxTime(); int[][] atRisk = result.getSurvivalAtRisk();; String[] groupNames = result.getSurvivalGroupNames(); System.out.println("\n\nSURVIVAL TIME = " + timeList); System.out.println("\n\nTIME | NUMBER_AT_RISK | RATE | STANDARD_ERROR_OF_RATE | UPPER_CI | LOWER_CI "); for (int i = 0; i < survivalRate.length; i++) { System.out.println("\n\nTREATMENT GROUP = " + groupNames[i]+"\n"); for (int j = 0; j < survivalRate[i].length; j++) { if (upperCI[i][j] == 1) { System.out.println("\n" + survivalTime[i][j] +"\t" + atRisk[i][j] + "\t" + survivalRate[i][j] +"\t" + survivalSE[i][j] + "\t" + upperCI[i][j]+"\t\t" + lowerCI[i][j]); } else { System.out.println("\n" + survivalTime[i][j] +"\t" + atRisk[i][j] + "\t" + survivalRate[i][j] +"\t" + survivalSE[i][j] + "\t" + upperCI[i][j]+"\t" + lowerCI[i][j]); } } } } catch (Exception e) { System.out.println(e); } } } </pre>
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