Research & Resources  | PUF  | Acronyms  | Quality Pages  | Case Reports  | Publications


All AQI members can gain access to our Participant User File (PUF)

The PUF file is a collection of all cases in the National Anesthesia Clinical Outcomes Registry (NACOR). Data within this extract spans 18+ million cases, 4+ years, and 220+ heterogeneous sources. The file contains patient demographic, billing, procedural, and provider information, all in a single common format.

*** Clinical Outcomes are not included in the PUF file at this time ***

*** The file cannot be viewed in its entirety in excel (it is much too large). ***
*** You must use a statistical package to view the file. ***

Please Note:
Participants looking for practice specific benchmarks should look toward current reports available and make additional requests where needed.

Please notify AQI of any publications made using PUF data

Hospitals that have used the PUF data:


Albert Einstein College of Medicine

Anesthesia Services, P.A.

Brigham and Women's Hospital

Danville Anesthesia

Dartmouth-Hitchcock Medical Center

Medical College of Wisconsin

Montefiore Medical Center

Mount Sinai

UCSF - Department of Anesthesia

University of Florida

University of Rochester Department of Anesthesiology

University of Texas Medical Branch Galveston

University of Kentucky Department of Anesthesia

Vanderbilt University

Weill Cornell Medical College


The AQI currently has researchers exploring data in the following areas:

PONV, Regional Anesthesia, Mortality, Obstetrics, Clinical Productivity, Maternal Quality, Healthcare Research, Ambulatory Surgery, Cardiac Arrest, Central Line Placement, and Acute Kidney Injury.

There are many other areas open to be explored!  Contact the AQI for more information on data or how to receive access to the PUF.

Access to the PUF is granted to individual participants by application only.

Not a participant? Join us!

More information regarding the PUF (User Guide)

What exactly is in the PUF? (Data Dictionary)

Request access to the PUF

Note: The PUF is available in multiple download formats. The PUF is a comma delimited data file which is 5.4 GB uncompressed and contains 18+ million observations over a four year period from 220+ heterogeneous sources. This data file is too large to import into Microsoft Excel, doing so will truncate most of the data. The use of a statistical package such as STATASSPS, or database such as Microsoft SQL Server, DB2, Oracle  is required.

Please refer to the following supporting documents for additional information:

  • PUF_Q2_2014_ReadMe.txt: general information about the PUF_Q2_2014 file.
  • NACOR_PUF_Data_Dictionary.pdf: provides a listing of the variables found in the PUF along with their data types, label, definition and values
  • AQI_NACOR_PUF_User_Guide.pdf: Provides an introduction to the PUF, describes the process of requesting access to the PUF, file description, Data collection and background, Data Quality and limitation.