Table 2 Anti-tumor activity assessed by RECIST v1.1.

From: Phase Ib/II study of nivolumab combined with palliative radiation therapy for bone metastasis in patients with HER2-negative metastatic breast cancer

Efficacy

Cohort A (N = 18)

Cohort B (N = 10)

ORR, N (%) [90% CI]

2 (11%) [4–29]

0 (0%) [0–21]

DCR, N (%) [90% CI]

7 (39%) [23–58]

0 (0%) [0–21]

Best overall response, N (%)

Complete response

0 (0%)

0 (0%)

Partial response

2 (11%)

0 (0%)

Stable disease

5 (28%)

0 (0%)

Progressive disease

10 (55%)

7 (70%)

Could not be evaluated/assessed

1 (6%)

3 (30%)

  1. ORR objective response rate, DCR disease control rate.