[Retracted] Effects of Adding Ultrasound Biofeedback to Individualized Pelvic Floor Muscle Training on Extensibility of the Pelvic Floor Muscle and Anterior Pelvic Organ Prolapse in Postmenopausal Women

Table 1

Baseline characteristics of participants.

Variable	SG (n = 40)	CG (n = 37)	value
Age (years) (mean ± SD)	51.6 ± 4.1	52.8 ± 4.9	0.256
BMI (kg/m^2) (mean ± SD)	25.10 ± 2.13	24.28 ± 2.39	0.117
Number of deliveries (mean ± SD)	1.08 ± 0.57	1.05 ± 0.47	0.862
Mode of delivery (n)
Vaginal	28	28	0.846
Cesarean	9	7
Nulliparous	3	2
Oxford muscle strength (n)
Grade 2	20	15	0.472
Grade 3	14	18
Grade 4	6	4
The correct rate of PFMC	70%	73%	0.773
BSP (cm)	0.03 ± 0.66	−0.15 ± 0.69	0.257
Levator hiatus area (cm^2)	22.89 ± 2.92	23.87 ± 3.99	0.223

SD: standard deviation; BSP: the distance from the lowest point of the bladder to the inferior-posterior margin of the symphysis pubis; value if from the independent-sample t-test or the chi-square test.