Table 3:
Investigator-assessed objective response rate and disease control rate in biomarker-defined patient populations
| Patients, n (%) | dMMR/MSI-H per local assessment (N=74) |
|
|---|---|---|
| Objective response rate | Disease control for ≥12 weeks | |
| Tumour PD-L1 expression | ||
| ≥1% (n=21) | 6 (28·6) | 11 (52·4) |
| <1% (n=47) | 13 (27·7) | 35 (74·5) |
| Immune cell PD-L1 expression | ||
| Rare (n=24) | 5 (20·8) | 14 (58·3) |
| Intermediate (n=21) | 5 (23·8) | 17 (81·0) |
| Numerous (n=23) | 9 (39·1) | 15 (65·2) |
| Mutation status | ||
| BRAF mutant (n=12) | 3 (25·0) | 9 (75·0) |
| KRAS mutant (n=26) | 7 (26·9) | 16 (61·5) |
| BRAF/KRAS wild type (n=29) | 12 (41·4) | 23 (79.3) |
| Clinical history of Lynch syndrome* | ||
| Yes (n=27) | 9 (33·3) | 19 (70·4) |
| No (n=28) | 8 (28·6) | 21 (75·0) |
dMMR/MSI-H=DNA mismatch repair deficient/microsatellite instability–high; PD-L1=programmed death-1 ligand 1.
Lynch syndrome designation was based on the clinical records of the patients at sites in countries where this reporting was permitted (excluded Italy).