Sunday, August 30, 2015

ASDR & Probability of death

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The age specific death rate (ASDR) is defined as the number of death in the interval divided by the number of individuals (precisely the person-year lived) by those alive at the midpoint of the interval. It is denoted by Mx.

The probability of death for age interval is defined as the number of deaths in the interval divided by the number of individuals living at the beginning of the interval.
It is denoted by qx.
Relationship:
Let Dx stand for the observed number of deaths in a community in the age interval (x, x+n) during a calendar year. Also let Px be the number of people alive at age x of which Dx death occurs. Then age specific rate (Mx) is defined as-
which is the basic relationship between Mand qx. 

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