Use this mortality or life-table method when age intervals, deaths, exposures, survivorship, and open-ended interval assumptions refer to the same population and period.

m(x)

Death rates m(x) for each successive five-year group from age 15 to 59.

Width n

Width of each age interval in years.

a(x)

Average years lived within the interval by those dying; defaults to half the interval width.

45q15

Probability of dying between ages 15 and 60.

Life-table results depend on age grouping, exposure quality, the treatment of the first and terminal intervals, and assumptions about deaths within each interval. Sparse deaths can make rates unstable.

Complement a summary mortality result with age-specific death rates, survivorship, and exposure counts. A complete life table is preferable when the question involves several ages or remaining life expectancy.

• IMR Infant Mortality Rate Calculator

  Compute the infant mortality rate as deaths under age one per one thousand live births.

• MMR Maternal Mortality Ratio Calculator

  Compute the maternal mortality ratio as deaths attributed to pregnancy and childbirth per one hundred thousand live births.

• Mortality Graduation Chart Smoothing

  Graduate a schedule of central death rates for charting by applying the symmetric 1-2-1 weighted moving average (weights one, two, one over four) across ages, holding the first and last observed values fixed and repeating for the requested number of passes.