Statistics

What the repository holds, in numbers.

Repository statistics

What the Cannabis and Health Data Repository holds, in aggregate. Every number on this page is a count over de-identified records: there are no participant-level figures here, and any group smaller than 10 is shown as a range rather than a number, so a small study cannot be narrowed down to an individual.

1,816Participants

1Contributing studies

1Datasets available

18Harmonized variables

0Approved requests

0Publications enabled

Updated 24 minutes ago. These figures are recomputed whenever the catalog changes, with an hourly check as a fallback, so they follow the catalog rather than a fixed nightly run.

By study

Study	Participants
Realm of Caring Observational Research Registry (ORR)	1,816

Counts under 10 are shown as “<10”. Suppression is applied when the aggregate is computed, before it reaches this page, so the exact small number is never sent to a browser.

Data freshness

Headline counts are recomputed whenever a dataset is published or withdrawn, with an hourly check as a backstop. The charts are refreshed from the data lake on the same schedule and each one carries its own "as of" stamp, so a chart that has fallen behind says so rather than looking current.

Publication counts here and on the Research page are the same number read at different moments, so a newly added publication can appear on one before the other. If they disagree for longer than an hour, something has gone wrong and we would like to know.

Updated 24 minutes ago

Download the numbers

Every figure on this page as a single CSV, for press, policy and grant reporting. It contains the same suppressed aggregates shown here and no participant-level data.

⬇ Aggregates CSV

Individual charts also offer their own CSV and image from the menu on each card.

The Cannabis and Health Data Repository is administered jointly by Realm of Caring and Johns Hopkins University under NIH award 1UM1DA059000 (NIDA).

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Aggregate views only — no participant-level counts. Groups smaller than 10 are suppressed to protect participant privacy.