Live demo

Stratified survival

Do participants with high and low levels of this biomarker have different outcomes? Kaplan–Meier curves per group, with censor marks and an at-risk strip, above a histogram of the biomarker showing where the cut falls and how many land each side. The groups are a column's or a biomarker cut at its median, tertiles, quartiles or typed points, and the cut line can be dragged: the curves follow at once, and R is asked again when it is let go. Under it R's log-rank test, each group's median survival with its interval and, for two groups, the hazard ratio with its interval. Experimental: the curves are safety.viz's estimator, which awaits its clinical review. Click a curve or a count at risk to list its participants and open a participant's profile. The data is the synthetic study: 200 made-up participants, and no real one.