. 2017 Jul 31;5:e3615. doi: 10.7717/peerj.3615

Table 3. Comparison of pelvic floor ultrasound parameters between nulliparous and multiparous women (n = 342).

	Nulliparous (n = 179)	Multiparous (n = 163)	F	P
R
α angle (°)	118.81 ± 14.98	119.54 ± 17.03	0.155	0.694
β angle (°)	62.99 ± 13.37	65.25 ± 11.13	2.904	0.089
γ angle (°)	78.44 ± 9.62	79.38 ± 7.31	1.112	0.292
BNVP (cm)	2.63 ± 0.50	2.65 ± 0.48	0.170	0.680
HA (cm²)	10.99 ± 2.25	11.10 ± 2.26	0.251	0.616
VM
α angle (°)	136.20 ± 15.83	141.31 ± 16.82	8.494	0.004^*
β angle (°)	95.43 ± 23.49	102.12 ± 26.48	6.506	0.011^*
γ angle (°)	109.25 ± 12.62	114.14 ± 15.10	11.074	0.001^*
BNVP (cm)	1.37 ± 0.81	1.19 ± 0.96	3.970	0.047^*
HA (cm²)	14.13 ± 3.63	14.40 ± 3.51	0.668	0.414
VM-R
α angle (°)	17.39 ± 12.28	21.77 ± 14.43	10.008	0.002^*
β angle (°)	32.44 ± 20.42	36.87 ± 24.85	3.478	0.063
γ angle (°)	30.82 ± 12.32	34.82 ± 15.51	7.144	0.008^*
BNVP (BND) (cm)	1.25 ± 0.74	1.46 ± 0.91	5.635	0.018^*
HA (cm²)	3.14 ± 2.64	3.30 ± 2.67	0.420	0.517

Notes.

Significant difference between nulliparous and multiparous women.