if you have two straight lines on a survival curve that start at the same point that the HR will start at 1.00 near the point where the lines intersect and move to infinity as the lower line approaches 0% still alive
Should read:
if you have two straight lines on a survival curve that start at the same point that the HR will start near 1.00 at the point where the lines intersect and move to infinity as the lower line approaches 0% still alive