KMのPlotのマークを変える
km <- NULL
km.summary.table <- NULL
km <- survfit(Surv((intervention.days/30.4375),intervention.event==1)~1, data=FTUL1107, na.action
= na.omit, conf.type="log-log")
windows(width=7, height=7); par(lwd=1, las=1, family="sans", cex=1, mgp=