Table 2.

Summary of the distribution for all sonographic measurements in mm

Sonographic finding	Mean ± SD Median (IQR) Number (percentage %)
Uterine length (UL)*	69.06 ± 9.36
Cervical length (CL)*	20.78 ± 3.7
Residual myometrial thickness (RMT)	5 (3.2–6.5)
Scar to internal os distance (SO)*	9.79 ± 5.57
Endometrial thickness (EM)	6.3 (4.2–9)
Anterior myometrial thickness superior (sAMT)*	10.44 ± 2.89
Anterior myometrial thickness inferior (iAMT)	8.8 (7.5–10.2)
Posterior myometrial thickness opposite the scar (PMT)	11.4 (9.7–13.1)
Posterior myometrial thickness superior to scar (sPMT)*	12.58 ± 3.17
Posterior myometrial thickness inferior to scar (iPMT)	10.6 (8.8–12.1)
Residual myometrial thickness ratio (RMT%)	57.21 (40.37–71.84)
Niche	405 (81%)
Fibrosis	235 (47%)
Volume of the niche	80.08 (30.09–206.83)
Pattern 0 (no scar)	41 (8.2%)
Pattern 1 (niche)	221 (44.2%)
Pattern 2 (fibrosis)	53 (10.6%)
Pattern 3 (both niche and fibrosis)	185 (37%)

SD standard deviation, IQR interquartile range

The variables for which the assumptions of normality hold are marked with *