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Scale for the microscopic assessment of the agitated red blood cell (RBC) solution in the cross-match tube method
| 0 | No agglutinates visible upon agitation of RBCs |
| (+) | A few tiny agglutinates with most of the RBCs in suspension |
| 1+ | Many small agglutinates along with RBCs in suspension |
| 2+ | Some larger agglutinates with many small agglutinates |
| 3+ | Several large agglutinates with clear plasma |
| 4+ | 1–2 large agglutinates with clear plasma |
