Table 2 Secondary outcomes of tumor response assessed by the independent radiology committee and investigators

From: A multicenter, randomized, double-blind, placebo-controlled phase 3 study of Socazolimab or placebo combined with carboplatin and etoposide in the first-line treatment of extensive-stage small cell lung cancer

 

Socazolimab plus EC group (N = 248)

Placebo plus EC group (N = 248)

Secondary outcomes assessed by IRC

 Progression free survival (PFS)

 Events, n (%)

155 (62.5)

185 (74.6)

 Median (95% CI) (months)

5.55 (5.06–5.82)

4.37 (4.27–4.70)

 Hazard ratio (95% CI) and one-sided pa

0.569 (0.457–0.708), <0.0001

 6 months PFS % (95%CI)

41.3 (34.2–48.2)

21.9 (16.2–28.1)

 12 months PFS% (95%CI)

18.2 (12.6–24.5)

5.2 (2.5–9.4)

 Objective response rate (ORR), n (%) (95% CI) b

176 (75.5) (69.5–80.9)

160 (68.1) (61.7–74.0)

 Complete response (CR) n (%)

0

0

 Partial response (PR) n (%)

176 (75.5)

160 (68.1)

 Stable disease (SD) n (%)

48 (20.6)

54 (23.0)

 Duration of response (DoR)

 Median (95% CI) (months)

4.44 (4.11–5.32)

3.45 (3.06–4.11)

 DoR ≥ 6 months (%)

33.3

18.7

 DoR ≥ 12 months (%)

20.5

5.5

Secondary outcomes assessed by investigators

 Progression free survival (PFS)

 Events, n (%)

199 (80.2)

214 (86.3)

 Median (95% CI) (months)

5.32 (4.44–5.65)

4.30 (4.17–4.40)

 Hazard ratio (95% CI) and one-sided pa

0.653 (0.536–0.795), <0.0001

 6 months PFS % (95%CI)

33.3 (27.0–39.7)

21.2 (16.0–26.8)

 12 months PFS% (95%CI)

12.2 (8.2–17.1)

3.1 (1.3–6.2)

 Objective response rate (ORR), n (%) (95% CI) b

165 (70.5) (64.2–76.3)

154 (65.3) (58.8–71.3)

 Complete response (CR) n (%)

0

0

 Partial response (PR) n (%)

165 (70.5)

154 (65.3)

 Stable disease (SD) n (%)

52 (22.2)

53 (22.5)

 Duration of response (DoR)

 Median (95% CI) (months)

4.24 (4.11–4.63)

3.88 (3.02–4.11)

 DoR ≥ 6 months (%)

42.0

22.9

 DoR ≥ 12 months (%)

19.8

3.9

  1. aThe P value is based on the stratified log rank test. The hazard ratio is based on the CoX proportional risk model
  2. bBased on the evaluable patients in the full analysis set