Perineal Distensibility Using Epi-no in Twin Pregnancies: Comparative Study with Singleton Pregnancies

Table 3

Correlation between the pregnant women’s anthropometric data and their measurements from the Epi-no balloon circumference.

Pair of variables	𝑟	𝑃	Interval
MA versus Epi-no	−0.07	0.62	[−0.36, 0.22]
GA versus Epi-no	0.03	0.84	[−0.27, 0.32]
UH versus Epi-no	0.20	0.19	[−0.10, 0.48]
BMI versus Epi-no	0.28	0.06	[−0.02, 0.54]
AC versus Epi-no	0.36	0.01*	[0.06, 0.59]

MA: maternal age; GA: gestational age; UH: uterine height; AC: abdominal circumference; BMI: body mass index; 𝑟: Pearson’s correlation coefficient.
*Unpaired Student’s t-test.