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Table 3 Characteristics of included randomized controlled trials

From: Risk of thrombotic events in immune thrombocytopenia patients treated with thrombopoietic agents: a systematic review and meta-analysis

Study

Treatment duration

TAs

Control

Thrombotic events, n

History of thrombotic events as exclusion criteria, yes/no

  

Therapy

Patients, n

Method

Patients, n

TAs group

Control group

 

Bussel et al. 2007

6 weeks

Eltrombopag

30 mg, 50 mg, or 75 mg

88

Placebo

29

1:

- Thromboembolism in the small vessels of the liver and kidneys

0

Yes: excluded patients with thrombosis within 1 year before enrolment or myocardial infarction within 3 months before enrolment

Bussel et al. 2009

6 weeks

Eltrombopag

50 or 75 mg

76

Placebo

38

0

0

Yes: excluded patients with thrombosis within the previous years

Cheng et al. 2011

24 weeks

Eltrombopag

50 mg, could be adjusted to 25 mg or 75 mg

135

Placebo

62

3:

1 - Deep vein thrombosis

2 - Pulmonary embolism

0

Yes: excluded patients with arterial or venous thrombosis plus two or more thrombosis risk factors

Huang et al. 2018

6 weeks

Eltrombopag

25 mg, could be adjusted to 25 mg or 75 mg

17

Placebo

18

1:

- Cerebral infarction

0

Yes: excluded patients with history of arterial/venous thrombosis plus two or more thrombotic risk factors.

Tomiyama et al. 2012

6 weeks

Eltrombopag

12.5–25 mg

15

Placebo

8

1:

- Transient ischemic attack

0

Yes: excluded patients with a history of arterial or venous thrombosis within 1 year before enrolment

Yang et al. 2016

8 weeks

Eltrombopag

25–75 mg

104

Placebo

51

2:

- Cerebral infarction

- Deep vein thrombosis

0

Yes: excluded patients with any prior history of cardiovascular disease

Mei et al. 2021

10 weeks

Hetrombopag

2.5 or 5 mg

339

Placebo

85

1:

- Acute myocardial infarction

0

Yes: excluded patients with venous or arterial thrombosis

Bussel et al. 2014

4 weeks

Avatrombopag

2.5, 5, 10, 20 mg

59

Placebo

5

5:

- Stroke

- Myocardial infarction

- Retinal artery occlusion

- Iliac deep vein thrombosis

- Superficial thrombophlebitis

0

Yes: excluded patients with history of cardiovascular disease, thromboembolic disease, deep vein thrombosis

Jurczak et al. 2018

26 weeks

Avatrombopag 20 mg, could be adjusted to 40 mg or 5 mg

32

Placebo

17

3:

- Deep vein thrombosis

- Asymptomatic pulmonary embolism

- Cerebrovascular event

0

Yes: excluded patients with clinically significant arterial or venous thrombosis and cardiovascular disease

Bussel et al. 2006

6 weeks

Romiplostim

1, 3 or 6 µg/kg

17

Placebo

4

0

1:

- Popliteal deep vein thrombosis

Yes: any known risk factor for thromboembolic events or a history of cardiovascular disease

Kuter et al. 2008

24 weeks

Romiplostim

1 or 2 µg/kg

83

Placebo

42

2:

- Popliteal artery thrombosis.

- Stroke

1:

- Pulmonary embolism

No

Kuter et al. 2010

52 weeks

Romiplostim

3–10 µg/kg

157

Standard of care

77

11

(in 6 patients, include:

1 - Myocardial infarction

2 - Deep vein thrombosis

3 - Pulmonary embolism)

2

(in 2 patients)

No

Shirasugi et al. 2011

12 weeks

Romiplostim

3–10 µg/kg

22

Placebo

12

0

0

Yes: excluded patients with arterial thrombosis or a history of venous thrombosis necessitating anticoagulation therapy

Gu et al. 2013

1 week

rhTPO 15000U,

Methyllprednisolone 80 mg

31

Methyllprednisolone 80 mg

31

1:

- Acute myocardial infarction

0

Yes: excluded patients with history of thrombotic events

Wang et al. 2012

4 weeks

rhTPO 1 µg/kg,

Danazol 200 mg

73

Danazol 200 mg

67

0

0

Yes: excluded patients with history of thrombosis

Yu et al. 2020

2 weeks

rhTPO 300 U/kg, Dexamethasone 40 mg

100

Dexamethasone 40 mg

96

1:

- Cerebral infarction

0

Yes: excluded patients with a history of arterial or venous thrombosis

Zhou et al. 2015

2 weeks

rhTPO 300 U/kg, Rituximab 100 mg

77

Rituximab 100 mg

38

1:

- Myocardial infarction

0

No