KPIOperations & Supply Chain

Medication Error Rate

Number of medication errors per 1,000 patient days

What is Medication Error Rate?

Medication error rate is the number of medication errors per thousand patient days. It shows how safely medicines are prescribed, dispensed and given.

Medication errors can seriously harm patients, so tracking them helps focus safety improvements.

How this KPI is measured

Function
Operations & Supply Chain
Sub-function
Patient Safety
Industry
Healthcare
Type
Lagging
Impact
Risk
Unit
rate/1K pt days
Measurement frequency
Monthly
Formula
(Number of medication errors / Total patient days) × 1,000

How to calculate it

Divide the number of medication errors by total patient days, and multiply by 1,000.

For example, if 18 errors occurred over 9,000 patient days, the rate is 2 per 1,000 patient days.

Encourage open reporting, since a higher reported rate may reflect a better reporting culture rather than worse practice.

Where it is used

  • Improving patient safety

    Spot risks.

  • Targeting training and systems

    Fix weak steps.

  • Meeting safety standards

    Report results.

How to improve it

Tips and common mistakes

  • Rising reports can be a sign of a healthy reporting culture.
  • Focus on learning, not blame.
  • Track severity as well as number.

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