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Table 2 Subgroup analysis for the re-tear rate

From: The efficacy and safety of platelet-rich fibrin for rotator cuff tears: a meta-analysis

Subgroup

No. trials

Relative risk (95% CI)

P value

I2 (%)

Test of interaction, P

Total

7

1.30 (0.97, 1.75)

0.082

0.0

 

Operative technique

 Single row

2

1.65 (0.82, 2.77)

0.069

0.0

0.106

 Double row

2

0.87 (0.55, 1.39)

0.566

3.3

 Single or double row

3

1.60 (0.92, 2.77)

0.097

0.0

Risk of bias

 Low

3

1.49 (0.99, 2.25)

0.058

0.0

0.098

 Unclear/high

4

1.12 (0.73, 1.71)

0.607

7.1

Volume

 < 5 ml

1

1.77 (0.81, 3.87)

0.150

0.152

 ≥ 5 ml

3

1.40 (0.94, 2.10)

0.097

0.0

 Unclear

3

0.99 (0.59, 1.67)

0.963

28.2

Follow-up

 < 15 months

4

1.95 (0.87, 4.37)

0.103

0.0

0.105

 ≥ 15 months

3

1.37 (0.60, 3.10)

0.449

0.0

Size of rotator cuff tears

 Small-medium

3

0.77 (0.31, 1.86)

0.271

0.0

0.226

 Large-massive

4

1.72 (0.64, 4.28)

0.582

0.0