Public record
AST (aspartate aminotransferase): the public record
Each table is computed from the named federal dataset as of its data date; the method is under each one.
Population data
How AST (aspartate aminotransferase) is distributed in US adults
In the 2021 to 2023 US national health survey, the median AST (aspartate aminotransferase) was 21.0 IU/L in men aged 20 to 39 and 17.0 IU/L in women aged 20 to 39. Half of people in each group fall below the median; the row notes give the range covering the middle 90%.
| Measure | Value | Note |
|---|---|---|
| Men 20 to 39, median | 21.0 IU/L | middle 90% of people: 14.0 to 44.0; 589 people tested |
| Men 40 to 59, median | 22.0 IU/L | middle 90% of people: 14.0 to 42.8; 696 people tested |
| Men 60 and over, median | 21.0 IU/L | middle 90% of people: 14.0 to 38.0; 1,161 people tested |
| Women 20 to 39, median | 17.0 IU/L | middle 90% of people: 11.5 to 32.0; 776 people tested |
| Women 40 to 59, median | 19.0 IU/L | middle 90% of people: 13.0 to 38.0; 878 people tested |
| Women 60 and over, median | 20.0 IU/L | middle 90% of people: 14.0 to 36.0; 1,326 people tested |
How this was calculated
Computed survey-weighted 5th, 50th and 95th percentiles from the CDC public file by sex and age band, using the sample weight WTPH2YR. Groups with fewer than 50 people are left out.
US adults aged 20 and over who gave a sample in NHANES 2021 to 2023, CDC variable LBXSASSI (Aspartate Aminotransferase (AST) (IU/L))
These are population distributions, not clinical reference ranges or treatment targets. They include people with and without health conditions and people on medication. Laboratories differ in method and units.