TABLE 3

Programmed cell death protein ligand 1 (PD-L1) detection in pleural effusion based on all cases with successful PD-L1 analysis. Cross-classification of pleura biopsy and pleura effusion analysis results concerning PD-L1 detection

PD-L1 expression ≥50% of tumour cells defined as positivePD-L1 expression ≥1% of tumour cells defined as positive
Pleural biopsyTotalPleural biopsyTotal
PositiveNegativePositiveNegative
Pleural effusion
 Positive561112416
 Negative01010235
Total5162114721