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.

Fetal deaths

Stillbirths at or beyond the gestational threshold (28th week convention).

Early neonatal

Deaths of live-born children under 7 days.

Live births

Live births in the same period.

PM rate

Perinatal deaths per 1000 total births.

Definition

Definitional convention applied.

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.

• 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).

• Coale Demeny Region Family Lookup

  Validate and label a Coale-Demeny regional model life table family (West, North, East or South) at a mortality level from 1 to 25.

• 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.