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Table 1 Immunoreactive score (IRS) system. IRS = (A x B)

From: Positive staining of the immunoligand B7-H6 in abnormal/transformed keratinocytes consistently accompanies the progression of cervical cancer

A (% positive cells)B (intensity)
0 = no positive cells0 = no color reaction
1 < 10% of positive cells1 = mild reaction
2 = 10–50% of positive cells2 = moderate reaction
3 = 51–80% of positive cells3 = intense reaction
4 > 80% of positive cells