Variable

Categories

Number

Mean ± SD

Z

P value

Patch size (cm²)

Before needling

22

4.55 ± 3.55

−1.000

0.317

2 weeks after needling

22

4.48 ± 3.42

Patch size (cm²)

Before needling

22

4.55 ± 3.55

−1.826

0.068

2 months after needling

22

4.26 ± 3.30

Patch size (cm²)

Before needling

22

4.55 ± 3.55

−1.826

0.068

4 months after needling

22

3.85 ± 3.31