Characteristics

Single layer

(Total = 55)

Double layer

(Total = 32)

P-value

Relative effect

Shape

Semicircular

29 (52.7%)

18 (56.3%)

#0.714

NA

NA

Triangular

18 (32.7%)

8 (25.0%)

Droplet

8 (14.6%)

6 (18.8%)

Mean ± SE

95% CI

Length (mm)

4.1 ± 1.0

5.6 ± 1.0

^<0.001*

−1.4 ± 0.2

−1.9 - −1.0

Depth (mm)

5.5 ± 1.4

4.7 ± 1.2

^0.009*

0.8 ± 0.3

0.2–1.4

Width (mm)

3.7 ± 0.9

4.7 ± 0.8

^<0.001*

−1.0 ± 0.2

−1.4 - −0.7

Residual myometrial thickness (mm)

4.0 ± 1.0

5.6 ± 1.2

^<0.001*

−1.6 ± 0.2

−2.1 - −1.1

Adjacent myometrial thickness (mm)

9.5 ± 1.2

10.3 ± 1.3

^0.009*

−0.8 ± 0.3

−1.3 - −0.2

Residual myometrial thickness ratio

43.0 ± 10.7

54.9 ± 10.7

^<0.001*

−12.0 ± 2.4

−16.7 - −7.2