Programmed cell death protein ligand 1 (PD-L1) detection in pleural effusion based on all cases with successful PD-L1 analysis. Sensitivity, specificity, positive predictive value, negative predictive value, positive likelihood ratio, negative likelihood ratio
| Parameter | PD-L1 expression ≥50% of tumour cells defined as positive | PD-L1 expression ≥1% of tumour cells defined as positive | ||
| Estimate | 95% CI | Estimate | 95% CI | |
| Sensitivity % | 100 | 46–100 | 86 | 56–97 |
| Specificity % | 63 | 36–84 | 43 | 12–80 |
| Positive predictive value % | 45 | 18–75 | 75 | 47–92 |
| Negative predictive value % | 100 | 66–100 | 60 | 17–93 |
| Positive likelihood ratio | 2.67 | 1.42–5.02 | 1.50 | 0.76–2.95 |
| Negative likelihood ratio | 0.00 | Not defined | 0.33 | 0.07–1.56 |