Table 2 Effect of moderators for tranexamic acid.

From: Tranexamic acid in ear surgery: enhancing surgical field visibility and reducing bleeding—a systematic review and meta analysis

Variables

Duration of surgery (minutes)

Mean arterial pressure (mmHg)

k

β

MD

95% CI

P

k

β

MD

95% CI

P

No. of total patients

3

0.412

 

− 1.180

2.003

0.612

3

− 0.118

 

− 0.211

− 0.026

0.012

Age

3

− 1.049

 

− 2.147

0.049

0.061

–

–

 

–

–

 

Male rate

3

0.790

 

− 0.411

1.000

0.197

–

–

 

–

–

 

Country

     

< 0.001

     

0.011

 China

1

 

− 16.590

− 23.716

− 9.464

       

 India

1

 

− 0.460

− 2.118

1.198

 

1

 

− 1.480

− 2.460

− 0.500

 

 Iran

1

 

4.300

− 3.150

11.750

 

2

 

− 4.000

− 5.691

− 2.309

 

Control for normal saline

           

0.391

 Yes

–

 

–

–

–

 

2

 

− 2.500

− 4.925

− 0.076

 

 No

–

 

–

–

–

 

1

 

− 4.000

− 6.417

− 1.583

 
  1. k number of effect sizes, β regression coefficient, MD standardized mean difference; P value from meta-regression analysis using the restricted maximum likelihood.
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