Mortality Table

MORTALITY TABLE

Process involved in constructing mortality table:

Column lx= Number of survivors at successive ages

Column dx= Number of death at successive ages.

Ex= The number of lives who at some time or other during the period of investigation attained age X and remained under observation for a full year from the date of attaining age X.

Θx=Number of deaths between ages X and X+1.

Θx/Ex= Observed rate of mortality.

Example given below illustrates how exposed to risk Ex and observed deaths Θx can be obtained for different ages under life year method on a sample data obtained for investigation carried out for the period 1.1.1980 to 31.12.1984.

Calculation of exposed to risk (Ex) and observed deaths (Θx)

Case | DOB | Date of entry to assurance | Date and mode of exit from the observation |

1 | 2 | 3 | 4 |

A | 1.4.1928 | 1.7.1964 | 1.10.1983 withdrawal |

B | 27.1.1929 | 25.6.1969 | 31.12.1984 End of observation |

C | 25.12.1925 | 26.12.1981 | 25.6.1982 withdrawal |

D | 1.7.1929 | 1.5.1981 | 1.11.1984 death |

E | 1.12.1926 | 2.2.1963 | 31.12.1984 end of observation |

F | 7.6.1930 | 2.6.1980 | 31.12.1984 end of observation |

G | 9.9.1926 | 10.11.1970 | 26.1.1982 death |

H | 1.3.1927 | 7.4.1979 | 10.3.1980 withdrawal |

I | 21.10.1927 | 28.8.1983 | 6.2.1984 death |

J | 18.2.1923 | 10.5.1974 | 31.12.1984 end of observation |

K | 10.10.1928 | 17.11.1983 | 31.12.1984 end of observation |

L | 15.4.1927 | 16.4.1980 | 10.11.1984 withdrawal |

M | 25.1.1925 | 4.10.1979 | 3.4.1980 withdrawal |

N | 20.6.1929 | 22.7.1984 | 31.12.1984 end of observation |

| | | |

Age | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 |

A | | | 1 | 1 | 1 | | | | | | |

B | | 1 | 1 | 1 | 1 | | | | | | |

C | | | | | | | | | | | |

D | | | 1 | 1 | 1 | | | | | | |

E | | | | | 1 | 1 | 1 | 1 | | | |

F | 1 | 1 | 1 | 1 | | | | | | | |

G | | | | | 1 | (1) | | | | | |

H | | | |...