. Author manuscript; available in PMC: 2023 Sep 1.

Published in final edited form as: Clin Gastroenterol Hepatol. 2021 Dec 8;20(9):2091–2101.e5. doi: 10.1016/j.cgh.2021.11.040

Table 3.

Correlation Coefficients for Principal Component (PC) Scores vs Anorectal Pressures and Abdominal Muscle thickness

Variables ^a	Correlation coefficients
	PC1 (29%)	PC2 (21%)	PC3 (14%)	PC4 (11%)
Pressure, mmHg
Anal pressure, rest	0.07	0.73 ^***	0.44 ^***	0.29^**
Rectal resting pressure	0.22^*	0.73 ^***	−0.41 ^***	−0.25^*
Anal pressure, evacuation	−0.05	0.64 ^***	0.49 ^***	0.39 ^***
Rectal pressure, evacuation	0.18	0.70 ^***	−0.43 ^***	−0.18
Muscle thickness, mm
External oblique, rest	0.65 ^***	−0.21^*	−0.13	0.32^**
Internal oblique, rest	0.67 ^***	−0.21^*	0.32^**	−0.005
Transversus abdominis, rest	0.73 ^***	−0.002	0.06	−0.24^*
External oblique, evacuation	0.50 ^***	−0.10	−0.37 ^***	0.50 ^***
Internal oblique, evacuation	0.56 ^***	−0.002	0.47 ^***	−0.48 ^***
Transversus abdominis, evacuation	0.71 ^***	0.08	−0.05	−0.03

Correlation coefficients with an absolute value of 0.4 or greater, which indicates that the variable is correlated substantially with the factor, are shown in bold.

p<.05

^**

p<.01

^***

p<.001