Smaller Anterior Cruciate Ligament Diameter Is a Predictor of Subjects Prone to Ligament Injuries: An Ultrasound Study

Table 2

ACL diameter measurements between injured and control subjects.

	ACL injured; (mean ± SD) ( = 25)	Control; (mean ± SD) ( = 25)	Mean difference; (95% CI)	value^*
Ultrasound ACL diameter (cm) measurements by radiologist 1	0.61 ± 0.06	0.80 ± 0.07	−0.19; (−0.23 to −0.16)	<0.0001
Ultrasound ACL diameter (cm) measurements by radiologist 2	0.62 ± 0.09	0.81 ± 0.07	−0.18; (−0.23 to −0.14)	<0.0001
Mean ultrasound ACL diameter (cm) measurements by both radiologists	0.62 ± 0.07	0.81 ± 0.06	−0.19; (−0.23 to −0.15)	<0.0001
ACL diameter (MRI versus US) (cm) measurements in 10 controls by radiologist 1		0.84 ± 0.05; versus; 0.80 ± 0.06	−0.04; (−0.07 to −0.00)	0.06^†
MRI ACL diameter (MRI versus US) (cm) measurements in 10 controls by radiologist 2		0.81 ± 0.06; versus; 0.79 ± 0.08	−0.19; (−0.06 to −0.03)	0.449^†

CI: confidence interval.
^* value computed using unpaired -test.
^†Paired -test.