---
title: "Data Access & Research Use"
id: "9375"
type: "page"
slug: "dar-statistics"
published_at: "2026-09-14T20:13:22+00:00"
modified_at: "2026-10-02T20:57:59+00:00"
url: "https://dss.niagads.org/dar-statistics/"
markdown_url: "https://dss.niagads.org/dar-statistics.md"
excerpt: "Explore approved Data Access Requests (DARs), research use, participating researchers and institutions, and trends in the use of NIAGADS controlled-access data. Each DAR is counted once based on its initial approval; renewals are not counted as new DARs."
---

Explore approved Data Access Requests (DARs), research use, participating researchers and institutions, and trends in the use of NIAGADS controlled-access data. Each DAR is counted once based on its initial approval; renewals are not counted as new DARs.

Data current as ofOctober 8, 2026

OverviewApproved Research Projects

## Explore Approved DARs

Dataset search by accession or name

Approval YearAll Years

Country (PI Institution)All Countries

Current DAR Status All Statuses Active Expired Closed

Clear Filters

**264** approved DARs match the current filters

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No approved DARs match the current filters.

Try removing one or more filters to broaden your results.

Clear Filters

Total Unique Approved DARs264

New DARs Approved in the Past 12 Months42

Participating Researchers1,090230 PIs · 860 Collaborators

PI Institutions*182

Countries Represented (PI institution)16

Current DAR Status Active**146** (55%)

 Expired**74** (28%)

 Closed**44** (17%)

## DARs by PI Institution Country

Country of the DAR PI’s institution. Select a country on the map or in the list to filter the page.

MapList

+−

| Country | Unique DARs | PI Institutions | Researchers |
| --- | --- | --- | --- |

View all countries

## Most Requested Datasets

View all datasetsA single DAR may request multiple datasets; dataset-level counts therefore should not be summed to calculate the total number of unique DARs.

## Cumulative Unique DARs Approved

Cumulative number of unique DARs based on initial approval date. Select a year to filter the page.

## New Unique DARs Approved by Year

Number of DARs receiving initial approval during each calendar year. Renewals are excluded. Select a year to filter the page.

## PI Institution Type

Matching DARs by the type of the PI’s institution, as recorded on each DAR. Select a type to see its approved research projects.

## Approved Research Projects

PI PI Institution PI Institution Type  All Non-Profit / Academic For-Profit

Export CSV Column visibility Visible columns

| Project Title | PI | PI Institution | PI Institution Type | Country | Datasets | Publications | Initial Approval | Status | Details |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |

Rows per page  10 25 50 100

 How these statistics are calculated **Unique DAR:** Each Data Access Request is counted once, based on its initial approval. Annual renewals are not counted as additional DARs.

**Initial approval date:** The date the DAR was initially approved. Year filters and trend charts use this date.

**Researcher:** A PI, or an internal collaborator named on the DAR when it was approved. Each person is counted once, even when they take part in several matching DARs or are the PI on one DAR and a collaborator on another. External collaborators, who work under their own institutions' agreements, are not counted.

**Active DAR:** The research project remains approved and authorized to use the requested data.

**Expired DAR:** The DAR's approval period has ended and the DAR has been neither renewed nor formally closed.

**Closed DAR:** The project has been closed, required data destruction has occurred, and continued data use is no longer authorized.

**PI institution:** The institution of the DAR’s principal investigator (PI), as recorded on the DAR itself, so it does not change if the PI later moves elsewhere. Institution counts, the institution filter and the project table use it.

**PI institution type:** Whether the PI’s institution is non-profit / academic or for-profit, as recorded on the DAR.

**Geography:** Geographic statistics are based on the country of the DAR PI’s institution. Collaborators may be located at additional institutions or in additional countries.

**Research use statement:** The approved description of how the investigator intends to use the requested data, shown on each DAR's detail page.

**Datasets:** A single DAR may request multiple datasets, so dataset-level counts should not be summed.

* Institution counts are based on the institution names recorded in approved DARs and may include minor naming variations, because institution names are not completely normalized.