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Table 2 Evaluation criteria of MDR1/P-gp expression using the immunoreactive score [17]

From: Relationship between the expression of cyclooxygenase 2 and MDR1/P-glycoprotein in invasive breast cancers and their prognostic significance

Percentage of positive cells Points Intensity of reaction Points
No positive cells 0 No reaction 0
<10% 1 Weak reaction 1
10–50% 2 Moderate reaction 2
51–80% 3 Intense reaction 3
>80% 4   
  1. MDR1/P-gp, MDR1/P-glycoprotein.