. Author manuscript; available in PMC: 2022 Jun 7.

Published in final edited form as: Am J Obstet Gynecol. 2021 Nov 18;226(5):708.e1–708.e13. doi: 10.1016/j.ajog.2021.11.1353

TABLE 1.

Normalized fiber length (L_fn, millimeters) of the pelvic floor muscles and tibialis anterior in the presence of load and/or pregnancy hormones presented as mean±standard error of mean

Muscle	Load⁻/Hormones⁻ (N=10)	Load⁺/Hormones⁻ (N=9)	P value^a	Reduced Load/Hormones⁻ (N=9)	P value^a	Load⁺/Hormones⁺ (N=5)	P value^a
Coccygeus	9.97±0.26	13.33±0.94	<.0001	12.06±0.44	.0075	12.82±0.30	.0018
Pubocaudalis	19.52±0.34	21.20±0.52	.0406	20.80±0.59	.1567	22.53±0.33	.0009
Iliocaudalis	19.45±0.42	21.00±0.46	.0646	20.74±0.49	.1540	21.45±0.83	.0407
Tibialis anterior	20.07±0.39	20.58±0.44	.8076	21.44±0.51	.1202	21.21 ±0.39	.3770

	P value^b
Muscle	Load⁻/Hormones⁻ vs Load⁺/Hormones⁺	Load⁻/Hormones⁻ vs Load⁺/Hormones⁻	Load⁻/Hormones⁻ vs Reduced Load/Hormones⁺	Load⁺/Hormones⁺ vs Load⁺/Hormones⁻	Load⁺/Hormones⁺ vs Reduced Load/Hormones⁺	Load⁺/Hormones⁻ vs Reduced Load/Hormones⁺
Coccygeus	.003	<.0001	.01	.93	.79	.27
Pubocaudalis	.002	.07	.24	.38	.16	.94
Iliocaudalis	.07	.11	.24	.95	.82	.98
Tibialis anterior	.50	.88	.19	.87	.99	.61

The P values were derived from 2-way analysis of variance followed by Dunnett multiple comparisons test, with the significance levels set to 5%

P values were derived from 2-way analysis of variance followed by Tukey multiple comparisons test, with the significance levels set to 5%.