That sounds like a lot, until you realize that it means your “survival” chances go up only nine points, from 70% to 79%, because it is the 30% recurrence rate that drops 30%, to 21%.
Suena a bastante, hasta que te das cuenta de que tus probabilidades de "supervivencia" aumentan apenas nueve puntos, de 70% a 79%., porque lo que cae en un 30% es la tasa de recurrencia, a un 21%.