Table 2 Strength of evidence for each intervention-outcome pair
From: Interventions to prevent iatrogenic anemia: a Laboratory Medicine Best Practices systematic review
| Â | Outcome (number of studies; strength of evidence rating) | ||||
|---|---|---|---|---|---|
Intervention | Test requisition | Blood loss | Decline in hemoglobin | Anemia | Transfusion |
Small volume tubes | 1; insufficient | 2; insufficient | 2; insufficient | 1; suggestive | 2; insufficient |
Closed blood sampling devices | 0; not applicable | 4; moderate | 7; insufficient | 0; not applicable | 4; insufficient |
Point of care testing | 0; not applicable | 3; insufficient | 0; not applicable | 0; not applicable | 2; insufficient |
Bundled interventions | 0; not applicable | 4; suggestive | 3; insufficient | 0; not applicable | 3; inconsistent |
Education | 2; insufficient | 1; insufficient | 1; insufficient | 0; not applicable | 1; insufficient |