The mortality rate or death rate was a statistical measurement of the rate of deaths in a population. The mortality rate of the Cerebus II rejuvenation process was high. (TNG: "Too Short a Season" ) The cardiac replacement procedure known as Van Doren's technique had a mortality rate of 2.4%, which was considered low. (TNG: "Samaritan Snare" ) By the end of the first month of Prefect Dukat's administration, the death rate in Bajoran labor camps was down by 20%. (DS9: "Waltz")