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. 2017 Oct 6;8(54):92890–92903. doi: 10.18632/oncotarget.21641

Table 4. PD-L1 expression correlates with the absence of HPV.

Variable (number of patients evaluated) PD-L1 expression p-value
Positive Negative
Ki-67 immunoreactivity (85) High 3 26 1.00
Low 6 50
NA 1 17
p53 immunoreactivity (90) Positive 4 17 0.23
Negative 6 63
NA 0 13
p16INK4a immunoreactivity (94) Positive 0 30 0.028
Negative 10 54
NA 0 9
HPV high risk (100) Present 0 31 0.029
Absent 10 59
NA 0 3

NA, not available.