Table 1 Demographic characteristics of participants in case and control groups and odds ratios between ABO blood types.

From: ABO blood types associated with the risk of venous thromboembolism in Han Chinese people: A hospital-based study of 200,000 patients

  

VTE group

Control group

P-value

Subjects, n

 

1412

199,248

 

Male, n (%)

 

637 (45.1)

77,647 (39.0)

0.000

Age, mean + SD, y

 

57.3 + 17.3

47.5 + 18.7

0.000

Blood group, n

A

425

54,735

 
 

B

487

64,490

 
 

AB

160

19,905

 
 

O

340

60,118

 

Blood group, OR (95% CI)

A - O

1.373 (1.190–1.584)

—

 
 

B - O

1.335 (1.162–1.534)

—

 
 

AB - O

1.421 (1.177–1.716)

—

 
 

Non-O - O

1.362 (1.205–1.540)

1.355 (1.199–1.532)*

—

 
 

A - B

1.028 (0.902–1.172)

—

 
 

A - AB

0.966 (0.805–1.159)

—

 
 

B - AB

0.939 (0.785–1.124)

—

 
  1. VTE, venous thromboembolism; SD, standard deviation, OR, odds ratio.
  2. *OR adjusted for gender and age.
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