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Table 7 Summary of efficacy outcomes

From: Cetuximab plus platinum-based chemotherapy in head and neck squamous cell carcinoma: a randomized, double-blind safety study comparing cetuximab produced from two manufacturing processes using the EXTREME study regimen

Outcome

US commercial cetuximab

Arm A

(N = 77)

BI-manufactured cetuximab

Arm B

(N = 71)

Unadjusted HR

Arm A vs Arm B

(95 % CI; p value)

OS (months), median (95 % CI)

9.23 (7.10, 11.80)

9.46 (6.87, 11.43)

0.92 (0.619, 1.368; p = 0.681)

PFS (months), median (95 % CI)

4.70 (3.52, 5.82)

5.65 (4.04, 6.47)

1.04 (0.717, 1.497; p = 0.850)

Overall response rate, % (95 % CI)

29.9 (19.6, 40.1)

36.6 (25.4, 47.8)

NA

Disease control rate, % (95 % CI)

58.4 (47.4, 69.4)

62.0 (50.7, 73.3)

NA

Complete response, n (%)

3 (3.9)

3 (4.2)

NA

Partial response, n (%)

20 (26.0)

23 (32.4)

NA

Stable disease, n (%)

22 (28.6 %)

18 (25.4 %)

NA

  1. Abbreviations: BI Boehringer Ingelheim, CI confidence interval, HR hazard ratio, NA not applicable, OS overall survival, PFS progression-free survival, US United States