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.

Family

Regional family of the model life tables.

Level

Mortality level from 1 (highest mortality) to 25 (lowest).

Code

Canonical single-letter family code.

Model

Full model life table label.

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.

• Neonatal Postneonatal Split Lookup

  Split the infant mortality rate into its neonatal component (deaths under 28 days) and postneonatal component per thousand live births, with the neonatal share of infant deaths.

• Perinatal Rate Definition Lookup

  Compute the perinatal mortality rate as late fetal plus early neonatal deaths per one thousand total births and state the WHO definitional convention used.

• Radix L0 Perinatal A0 Lookup

  Look up the conventional life-table radix l0 (100000 for the HMD/UN standard or 1 for a unit radix) and the first-interval separation factor a0 under the midpoint rule (n/2) or the Coale-Demeny infant rule (0.07 + 1.7 m0).