Defined Daily Doses per 100 Bed-Days and per 1,000 Patient-Days
Defined daily doses from grams used, with the rates per 100 bed-days and per 1,000 patient-days.
Open the tool → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Grams used in the period
- 1200 g
- DDD of the agent, from the WHO index
- 2 g
- Bed-days (or patient-days) in the period
- 4500
- Year of the index the DDD came from
- 2026
Result: 600 DDDs: 13.33 per 100 bed-days, 133.33 per 1,000 patient-days.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Grams used in the period
- DDD of the agent, from the WHO index
- Bed-days (or patient-days) in the period
- Year of the index the DDD came from (optional)
How this is calculated
Citation
WHO Collaborating Centre for Drug Statistics Methodology. Use of ATC/DDD: hospital drug use presented as DDDs per 100 bed-days. The DDD of each agent is entered by the reader from the ATC/DDD index; no DDD values are reproduced. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.