Human knee laxity in ACL-deficient and physiological contralateral joints: intra-operative measurements using a navigation system

Imbert, Pierre; Belvedere, Claudio; Leardini, Alberto

doi:10.1186/1475-925X-13-86

Table 3 Mean values of ARR, expressed in degrees, and APL, expressed as percentage of AP-tib, for the Internal-External rotation tests; these are reported for the medial and lateral compartments of both knees, and for the two joint positions.

From: Human knee laxity in ACL-deficient and physiological contralateral joints: intra-operative measurements using a navigation system

			CHK		ADK		R ² _CHK→ADK; *; p* _CHK→ADK
			Mean ± SD	R ² _{intra→extra;} *; p* _{intra→extra}	Mean ± SD	R ² _{intra→extra;} ;p _{intra→extra}
ARR [deg]	20° Knee Flexion
		intra	11.4 ± 5.5	R² *= 0.012; p = 0.293*	13.2 ± 4.0	R² *= 0.001; p = 0.932*	R² *= 0.035; p = 0.139*
		extra	12.6 ± 3.8	R² *= 0.012; p = 0.293*	13.3 ± 4.6	R² *= 0.001; p = 0.932*	R² *= 0.006; p = 0.538*
		tot	23.9 ± 5.8		26.4 ± 5.5		R² *= 0.051; p = 0.073*
	90° Knee Flexion
		intra	18.0 ± 6.3	R² *= 0.017; p = 0.301*	20.0 ± 5.3	R² *= 0.013; p = 0.374*	R² *= 0.030; p = 0.172*
		extra	19.5 ± 5.4	R² *= 0.017; p = 0.301*	18.7 ± 6.7	R² *= 0.013; p = 0.374*	R² *= 0.005; p = 0.567*
		tot	37.5 ± 6.5		39.0 ± 6.1		R² *= 0.014; p = 0.345*
	R ² _20°→90° *; p* _20°→90°
		*intra*	R² *= 0.246; p < 0.001*		R² *= 0.350; p < 0.001*
		*extra*	R² *= 0.359; p < 0.001*		R² *= 0.184; p = 0.001*
		*tot*	R² *= 0.560; p < 0.001*		R² *= 0.551; p < 0.001*
			CHK		ADK		R ² _CHK→ADK; *; p* _CHK→ADK
			Mean ± SD	R ² _med→lat; *; p* _med→lat	Mean ± SD	R ² _med→lat; *; p* _med→lat
APL [' AP-tib]	20° Knee Flexion
		medial	33.3 ± 14.2	R² *= 0.039; p = 0.117*	44.1 ± 12.8	R² *= 0.017; p = 0.311*	R² *= 0.150; p << 0.001*
		lateral	38.5 ± 12.0	R² *= 0.039; p = 0.117*	41.1 ± 13.0	R² *= 0.017; p = 0.311*	R² *= 0.011; p = 0.407*
	90° Knee Flexion
		medial	46.0 ± 15.1	R² *= 0.194; p < 0.001*	52.7 ± 11.4	R² *= 0.197; p < 0.001*	R² *= 0.060; p = 0.052*
		lateral	60.9 ± 15.8	R² *= 0.194; p < 0.001*	65.4 ± 14.4	R² *= 0.197; p < 0.001*	R² *= 0.022; p = 0.246*
	R ² _20°→90° *; p* _20°→90°
		*medial*	R² *= 0.163; p < 0.001*		R² *= 0.101; p = 0.008*
		*lateral*	R² *= 0.398; p < 0.001*		R² *= 0.446; p < 0.001*

For all possible couples of these values, R² and p are also reported, in Italic.

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ISSN: 1475-925X

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