Table 2 AEs occurring in ≥10% of patients and any grade 3 or higher AEs

From: A bispecific antibody–drug conjugate targeting EGFR and HER3 in metastatic esophageal squamous cell carcinoma: a phase 1b trial

Event, n (%)

Total (N = 82)

2.0 mg kg−1 D1D8 Q3W (N = 22)

2.5 mg kg−1 D1D8 Q3W (N = 60)

All grade

Grade ≥3

All grade

Grade ≥3

All grade

Grade ≥3

Any TRAE

82 (100)

48 (58.5)

22 (100)

10 (45.5)

60 (100)

38 (63.3)

Anemia

70 (85.4)

23 (28.0)

19 (86.4)

6 (27.3)

51 (85.0)

17 (28.3)

Leukopenia

44 (53.7)

13 (15.9)

10 (45.5)

2 (9.1)

34 (56.7)

11 (18.3)

Thrombocytopenia

44 (53.7)

12 (14.6)

9 (40.9)

1 (4.5)

35 (58.3)

11 (18.3)

Neutropenia

35 (42.7)

12 (14.6)

7 (31.8)

2 (9.1)

28 (46.7)

10 (16.7)

Nausea

35 (42.7)

0

7 (31.8)

0

28 (46.7)

0

Asthenia

33 (40.2)

2 (2.4)

10 (45.5)

1 (4.5)

23 (38.3)

1 (1.7)

Lymphocyte count decreased

22 (26.8)

12 (14.6)

4 (18.2)

3 (13.6)

18 (30.0)

9 (15.0)

Proteinuria

21 (25.6)

0

2 (9.1)

0

19 (31.7)

0

Decreased appetite

18 (22.0)

0

2 (9.1)

0

16 (26.7)

0

Hyponatremia

17 (20.7)

0

2 (9.1)

0

15 (25.0)

0

Hypokalemia

15 (18.3)

3 (3.7)

2 (9.1)

0

13 (21.7)

3 (5.0)

Hypoalbuminemia

15 (18.3)

0

2 (9.1)

0

13 (21.7)

0

Vomiting

15 (18.3)

0

1 (4.5)

0

14 (23.3)

0

Weight decreased

15 (18.3)

0

2 (9.1)

0

13 (21.7)

0

ALT increased

13 (15.9)

1 (1.2)

2 (9.1)

0

11 (18.3)

1 (1.7)

Blood alkaline phosphatase increased

11 (13.4)

0

0

0

11 (18.3)

0

Stomatitis

10 (12.2)

0

0

0

10 (16.7)

0

Activated partial thromboplastin time prolonged

9 (11.0)

0

3 (13.6)

0

6 (10.0)

0

Diarrhea

9 (11.0)

0

3 (13.6)

0

6 (10.0)

0

Hypophagia

9 (11.0)

0

1 (4.5)

0

8 (13.3)

0

Rash

9 (11.0)

0

1 (4.5)

0

8 (13.3)

0

Pneumonia

7 (8.5)

5 (6.1)

1 (4.5)

0

6 (10.0)

5 (8.3)

BIL conjugated increased

6 (7.3)

1 (1.2)

2 (9.1)

0

4 (6.7)

1 (1.7)

Interstitial lung disease

3 (3.7)

2 (2.4)

1 (4.5)

1 (4.5)

2 (3.3)

1 (1.7)

Blood BIL increased

2 (2.4)

1 (1.2)

0

0

2 (3.3)

1 (1.7)

Blood BIL unconjugated increased

2 (2.4)

1 (1.2)

0

0

2 (3.3)

1 (1.7)

Atrial flutter

1 (1.2)

1 (1.2)

1 (4.5)

1 (4.5)

0

0

Bacteremia

1 (1.2)

1 (1.2)

0

0

1 (1.7)

1 (1.7)

Febrile neutropenia

1 (1.2)

1 (1.2)

0

0

1 (1.7)

1 (1.7)

Gastrointestinal disorder

1 (1.2)

1 (1.2)

0

0

1 (1.7)

1 (1.7)

Hypercalcemia

1 (1.2)

1 (1.2)

1 (4.5)

1 (4.5)

0

0

Hypermagnesemia

1 (1.2)

1 (1.2)

0

0

1 (1.7)

1 (1.7)

Oesophagomediastinal fistula

1 (1.2)

1 (1.2)

1 (4.5)

1 (4.5)

0

0