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Table 1 Summary statistics

From: Sickle cell disease, sickle trait and the risk for venous thromboembolism: a systematic review and meta-analysis

Outcome

N studies

Population

Odds ratio (95%CI)

P value

H (95%CI)

I2 (95%CI)

P heterogeneity

P Harbord test

SCD versus Control

 VTE

3

Adults

4.43 (2.62–7.48)

<.0001

1.0 (1.0–2.8)

0.0 (0.0–87.3)

.440

.467

 DVT

1

Adults

1.12 (1.09–1.15)

<.0001

NA

NA

NA

NA

 PE

2

Adults

3.66 (3.57–3.75)

<.0001

1.0

0.0

0.588

NA

 VTE

1

Pregnant and PP women

33.16 (9.70–113.37)

<.0001

NA

NA

NA

NA

 DVT

1

Pregnant women

30.66 (1.63–578.15)

.022

NA

NA

NA

NA

SCD versus SCT

 VTE

3

Adults

3.09 (1.79–5.33)

<.0001

1.0 (1.0–2.2)

0.0 (0.0–79.8)

.598

.524

 PE

1

Adults

3.14 (1.67–5.92)

.0004

NA

NA

NA

NA

 VTE

1

Pregnant and PP women

20.34 (4.05–102.05)

.0003

NA

NA

NA

NA

SCT versus Control

 VTE

4

Adults

1.71 (1.34–2.18)

<.0001

1.0 (1.0–2.5)

0.0 (0.0–83.5)

.427

.238

 DVT

3

Adults

1.23 (0.92–1.65)

.157

1.0 (1.0–1.5)

0.0 (0.0–55.7)

.791

.810

 PE

3

Adults

2.12 (1.18–3.80)

.012

2.3 (1.3–4.0)

80.6 (39.0–93.8)

.006

.405

 VTE

2

Pregnant and PP women

0.90 (0.28–2.89)

.863

1.48

47.5

0.168

NA

  1. CI confidence interval, DVT deep venous thrombosis, VTE venous thromboembolism, PE pulmonary embolism, PP postpartum, SCD, sickle cell disease, SCT sickle cell trait, NA not applicable