> For the complete documentation index, see [llms.txt](https://docs.finngen.fi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.finngen.fi/faq/about-endpoints/i-found-event_age-after-fu_end_age-in-endpoint-data-how-is-it-possible.md).

# I found EVENT\_AGE after FU\_END\_AGE in endpoint data, how is it possible?

This may have happened in DF8, where endpoint data’s [FU\_END\_DATE](/finngen-data-specifics/endpoints/complete-follow-up-time-of-the-finngen-registries-primary-endpoint-data.md) was the "[truncated](/finngen-data-specifics/endpoints/complete-follow-up-time-of-the-finngen-registries-primary-endpoint-data/survival-analysis-using-the-truncated-endpoint-file-secondary-endpoint-data.md)" date when follow-up of the most of the registers ended (31.12.2019). However, follow-up ended later than this in [hilmo register](/finngen-data-specifics/red-library-data-individual-level-data/what-phenotype-files-are-available-in-sandbox-1/registers-in-the-detailed-longitudinal-data.md) and [primary care register](/finngen-data-specifics/red-library-data-individual-level-data/what-phenotype-files-are-available-in-sandbox-1/registers-in-the-detailed-longitudinal-data.md) (March 2021). In this case EVENT\_AGE (in event that comes from eg. Hilmo register) could have been after FU\_END\_AGE.

**FU\_END\_AGE variable in endpoint data is individuals age at the**

* Common follow-up end date of the registers (a.k.a FU\_END\_DATE)

OR

* Age at death (if deceased – and even if moved abroad at some point)

OR

* Age at emigration (if moved abroad, and not deceased).

In DF9 we have changed the FU\_END\_DATE, so that it is the “latest follow-up date” of any register (in DF9 it is 11.10.21; when follow-up ends in hilmo and avohilmo), so this won’t happen in DF9.

Take a look also at the [Complete follow-up time of the FinnGen registries – primary endpoint data](/finngen-data-specifics/endpoints/complete-follow-up-time-of-the-finngen-registries-primary-endpoint-data.md) section.