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Comparison of the detection of PD‐L1 expression in large and small tissue specimens between the E1L3N and 22C3 assays
| Large (n = 185) | Small (n = 114) | p value | |
|---|---|---|---|
| E1L3N | |||
| Negative | 125 (67.6%) | 68 (59.6%) | |
| Weak positive | 40 (21.6%) | 25 (21.9%) | 0.160 |
| Positive | 20 (10.8%) | 21 (18.4%) | |
| 22C3 | |||
| Negative | 127 (68.6%) | 66 (57.9%) | |
| Weak positive | 38 (20.5%) | 26 (22.8%) | 0.080 |
| Positive | 20 (10.8%) | 22 (19.3%) | |
| Overall agreement | 97.8% (94.6–99.4%) a | 93.9% (87.8–97.5%) | 0.076 |
95% confidence interval.
