Medication Possession Ratio Calculator
Declared gross MPR sum dispensed days/reference period, OVERLAPS not removed and over1retained; not PDCor proof ingestion, independently defined denominator policy. All patient/product/route/units and applicable inputs independently clinically established; no dose, route, frequency, eligibility, titration, diagnosis or permission to administer is supplied.
Description
Medication possession ratio divides gross dispensed supply days by a defined observation period.
Medication possession ratio divides gross dispensed supply days by a defined observation period.1
This tool retains overlapping supply and ratios above one, distinguishing its bookkeeping convention from distinct-day coverage.
When to use Medication Possession Ratio Calculator
This tool retains overlapping supply and ratios above one, distinguishing its bookkeeping convention from distinct-day coverage.
How to use Medication Possession Ratio Calculator and how it works
- Prepare dispensed supply days, reference period days, using the input definitions and matching units below.
- Enter the required fields and run Medication Possession Ratio Calculator.
- Read result.value using the units, signs and ordering explained below.
- Correct any rejected inputs and rerun; interpret the result within the stated model and its assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualDispensedSupplyDays | Actual Dispensed Supply Days. Use the units and matching context stated in the calculation below. | array of number | Required; other constraints below |
| actualReferencePeriodDays | Externally defined observation denominator in days, under the branch constraints below. | number | Required; strictly positive; finite; other constraints below |
Require a nonempty list of nonnegative dispensed-supply days and a positive reference-period duration in days. Sum all supply values and divide by duration. Return a dimensionless gross possession ratio without overlap removal, clipping or rounding. A value above one is retained and is not a PDC fraction or proof of medication consumption.
grossMpr=sum(dispensedSupplyDays)/referencePeriodDays Apply the input ordering, units and branch conditions stated above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the calculated or selected fields below. | object |
| result.value | Numeric model result on the ratio, score, constant or density basis explained above. | number |
{
"input": {
"actualDispensedSupplyDays": [
6,
6
],
"actualReferencePeriodDays": 10
},
"output": {
"result": {
"value": 1.2
}
}
}Limitations and assumptions
Patient context, drug formulation, route, sampling time, assay units and applicable clinician-verified protocol must be independently established. The output supplies no dosing, titration, switching or administration instruction.
The calculation uses the supplied observations and model inputs. It does not collect measurements, select a reference population or coefficient, or establish that the model applies to the actual case. The stated branch conditions and output units remain part of the result.
All fields require explicit values. Unexpected fields, wrong types, nonfinite numbers and sparse arrays are rejected. Alignment, bounds and supported-token rules are explained above; extremely large inputs or nonfinite results can also fail. Input errors differ from successful false comparisons, unavailable-domain flags and empty match lists.
Alternative or Complementary methods
Use Pill Count Adherence Percentage Calculator for a complementary operation: A pill-count estimate reconciles dispensed and carried-in inventory against remaining inventory and known losses.
Use Proportion of Days Covered Calculator for a complementary operation: Proportion of days covered measures distinct covered days within a defined observation period.
References
-
Medication Possession Ratio Calculator — tool.io
Similar or alternative tools
- Pill Count Adherence Percentage Calculator
A pill-count estimate reconciles dispensed and carried-in inventory against remaining inventory and known losses.
- Proportion of Days Covered Calculator
Proportion of days covered measures distinct covered days within a defined observation period.