Table 1 Morphological measurements

Axial plane

LAM scoring

The LAM scoring system was used to assess the presence of LAM injury at the level of the inferior edge of the pubic symphysis

LHA

The area enclosed by the medial border of bilateral puborectalis muscle at the level of the inferior border of the pubic symphysis

Sagittal plane

H line

Distance from the inferior margin of the pubic symphysis to the posterior rectal wall at the anorectal junction

M line

Distance from the most distal H-line to the vertical line on the PCL

B-PCL

The vertical distance from the bladder neck to the PCL represents the position of the bladder neck, which is marked with a positive sign above PCL and a negative sign below

U-PCL

The vertical distance from the cervix to PCL represents the position of the cervix.

LPA

The angle between the levator plate and horizontal line

AUA

The angle between the long axis of the urethra and the vertical line

BND

The difference in distance from the bladder neck to PCL line at rest and straining

RVA

The angle between the long axis of the urethra and the posterior wall of the bladder

FUL

Distance from the lowest point of the bladder neck to the urogenital diaphragm

Bladder funnel

The widening of the proximal urethra at the ureterovesical junction

and funneling change at the vesical neck during straining, the presence-absence or of bladder funnel was recorded as positive or negative