Copy each column from your spreadsheet and paste it into the box below. One value per line — rows must align across all columns.
Load data then click
"Generate Survival Plot"
Leave empty to use all observed event times
Cox regression uses your loaded Time and Event columns. The Group variable (if loaded) will be used as the covariate. You can also add extra numeric covariates below.
Paste one covariate per box — same row order as your time/event data.
Hazard Ratio (HR): HR > 1 = increased hazard; HR < 1 = decreased hazard relative to reference.
95% CI: If the CI excludes 1, the effect is statistically significant.
p-value: Tests whether the covariate has a significant effect on survival.
concordance (C-index): Discrimination ability of the model; 0.5 = random, 1.0 = perfect.
Note: This implementation uses a Newton-Raphson partial likelihood approach. For large datasets or many covariates, results may differ slightly from R's coxph due to tie-handling differences (Efron vs Breslow).