Intervention period | Clinical pharmacist | ICU physician | Total costsa |
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 | Unit costsb | Number of hoursa | Costsa | Unit costsb | Number of hoursa | Costsa |  |
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First half | €70 | 52.76 | €3,693 | €100 | 0.625 | €62.5 | €3,756 |
Second half | €70 | 37.21 | €2,605 | €100 | 0.481 | €48.1 | €2,653 |
- A review by intensive care unit (ICU) hospital pharmacists and feedback to ICU physicians per 1,000 monitored patient-days. aPer 1,000 monitored patient-days. bUnit costs (gross salary costs per hour per specialist) are given per hour; for derivation of the unit costs, see Materials and methods.