OHDSI / OHDSI/CommonDataModel

How to Calculate Drug Dose page; definition of Drug_Exposure quantity field

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Drug Dose Discussion
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Description

EDIT: Please disregard the below statement, I misinterpreted the text.

The text:

"3. Quantified Drugs which are formulated as a concentration

Example: The Clinical Drug is Acetaminophen 250 mg/mL in a 5mL oral suspension. The Quantified Clinical Drug would have 1250 mg / 5 ml in the DRUG_STRENGTH table. Two suspensions are dispensed.
DRUG_STRENGTH The denominator_unit is either mg or mL. The denominator_value might be different from 1.
DRUG_EXPOSURE The quantity refers to a fraction or multiple of the pack.
In the example: 2
Ingredient dose= quantity x numerator_value [numerator_unit_concept_id]
Acetaminophen dose = 2 x 1250mg = 2500mg"

The example is 250 mg/ml, but the rest of the text states it is 1250mg. It should be 250mg. 1250 is an overdose and we don't want to accidentally give a toxic example for dose.

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the How to Calculate Drug Dose page text quoted in the issue and review the Drug_Exposure and Drug_Strength definitions. The issue is marked as misunderstood, so confirm whether any correction remains needed; done means the example and dose calculation are unambiguous and safe.

Written by the indexing model from the issue text.

Assessment

Tech stack
html
Domain
documentation
Issue type
Documentation
Difficulty
1/5
Estimated time
Under an hour
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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