Calculate the ratio of delivered dose intensity to the planned dose intensity to monitor treatment adherence and efficacy.
Planned Dose Intensity:
0 mg/day
Received Dose Intensity:
Relative Dose Intensity: 0%
Note: RDI represents the proportion of the standard dose delivered over time. Reductions in RDI may impact the long-term efficacy of chemotherapy regimens.
RDI is a measure used in oncology to compare the dose of chemotherapy actually delivered over time against the standard planned regimen.
Formula: RDI = (Actual Dose / Planned Dose) × (Planned Duration / Actual Duration) × 100
Example: A patient is planned for 400mg over 21 days but receives 360mg over 24 days.
What is a typical RDI threshold?
In many clinical settings, an RDI of 85% or higher is considered optimal for maintaining treatment efficacy.
Does a longer duration decrease RDI?
Yes, increasing the actual duration (delays) reduces the dose intensity even if the full dose is eventually delivered.
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