The Social Security area is not the CDC table

Two official tables name two populations

The Social Security Administration’s 2026 Trustees Report Table V.A5 publishes cohort life expectancy at birth for the Social Security area under the Intermediate assumptions. The National Center for Health Statistics’ complete United States life tables for 2024 publish period life expectancy for the United States resident population.

Life Days Left’s daily chart takes its birth-year shift from the SSA table. It does not substitute the CDC resident-population period figure for that step.

These rows describe the two official tables already cited on this site. They are definitions, not a numeric gap between the series.

What Table V.A5 covers

SSA Table V.A5 is a cohort series. Each birth year receives male and female values for the Social Security area. This site’s birth-year explorer averages those two columns so the chart can use one shift. That mean is not an official SSA total-population column.

The Social Security area is not identical to the resident population in the CDC U.S. life tables. It is also not limited to the 50 states and the District of Columbia.

The Intermediate alternative is one official assumption set. The Trustees Report also publishes low-cost and high-cost alternatives. Those other sets are not used here, and they are not individual confidence intervals.

What the CDC 2024 complete U.S. table covers

The complete United States life tables for 2024 report period life expectancy for the resident population. The at-birth figure already recorded on this site is 79.0 years for both sexes.

That number summarizes the 2024 mortality schedule. It is not a cohort estimate for people born in 2024, and it is not the leftover-days figure on the daily chart. The 2024 U.S. life table note keeps the period values. The note on remaining life expectancy at a current age explains why leftover days are a different construction.

What the daily chart uses

The methodology states an income-linked age-at-death baseline and an SSA birth-year shift. The shift is the difference between a birth year’s Table V.A5 Intermediate cohort life expectancy at birth and the 1967 reference of 78.3 years. That 78.3 figure is this site’s unisex average of the published male and female values for 1967.

The bracket is a relative movement inside one SSA series. Replacing it with the CDC 2024 resident period figure of 79.0 years would change the population, the assumption set, and the measure.

Nearby distinctions are not this one

Cohort versus period life expectancy is about which calendar mortality schedule a birth-year comparison should use. Remaining life expectancy at a current age is about whether leftover days rebuild a life table after someone has already reached that age. Life expectancy by generation is about labels applied after the birth-year calculation.

This note is about the population and assumption set attached to the shift itself. The chart uses the Social Security area under Intermediate assumptions. It does not use the CDC resident-population period table for that step.

Use each table for the question it answers

Use Table V.A5 when the question is about SSA’s Intermediate cohort series for the Social Security area, or about the birth-year shift on this chart. Use the CDC 2024 complete U.S. table when the question is about period mortality in the resident population during 2024.

Neither table says how long a named person will live. The chart has no health history, current income, location, or knowledge of chance events.

Life Days Left is listed among Ben Guo’s projects on hraness.com ↗.