OASIS Data Sets

Updates

April 1, 2026

The final OASIS-E2 Instruments (All Items and Time Point versions), effective April 1, 2026, are available in the Downloads section below. The instrument documents have been updated to include OMB approval information, the OMB control number (0938-1279), and an expiration date of 12/31/2028.

February 26, 2026

The final OASIS-E2 Instruments (All Items and Time Point versions) and OASIS-E2 Change Table, effective April 1, 2026, are available in the Downloads section below. 

August 12, 2025

NOW AVAILABLE – Draft OASIS-E2 Instruments and OASIS-E2 Change Table

The draft versions of the OASIS-E2 instruments are available in a zip file in the Downloads section, below. The OASIS-E2 Change Table is also available in the Downloads section, below, which notes the changes from the current version, OASIS-E1, to the proposed next version OASIS-E2.

December 23, 2024

NOW AVAILABLE- Final version of the OASIS-E1 All Items Instrument

The final version of the OASIS-E1 All Items instrument is now available in the Downloads section, below. 

December 16, 2024

NOW AVAILABLE- Final OASIS-E1 Time Points Instruments 

The final OMB-approved OASIS-E1 time points Instruments, effective 1/1/2025, are now available in a zip file in the Downloads section, below. 

A change table OASIS-E1 Instruments March 2024 – December 2024 Changes, also available in the Downloads section, below, lists minor corrections from the draft to final versions. The final OASIS-E1 All Items instrument will be posted when available.

December 6, 2022

NOW AVAILABLE – Final OASIS-E Instrument and OASIS-E Changes from Draft to Final Instrument & Manual

The final Outcome and Assessment Information Set Version E (OASIS-E) All Items and time point versions of the instrument, effective January 1, 2023, are available in the Downloads section below. A log of changes from the draft to final instrument and Manual is also available in the Downloads section on the OASIS Users Manuals webpage.