Table 3.

Summary of the results of the stepwise linear regression model of the acetabular and femoral cartilage lesion SHOMRI scores considering: (A) the first 5 mode of variation of the femoral shape as possible predictors. (B) Inclusion of the demographics and analysis of the interactions with shape (C) Ad-hoc analysis performed to compare 3D MRI-based shape feature and 2D radiograph-based geometrical measurements.

Table 3A
SHOMRI Prediction Model Obtained Without including Demographics (age, gender, BMI)	Acetabular Cartilage	SHOMRI Score
		Estimate	SE	tStat	P value
	Intercept	1.01006	0.16074	6..261	2.00E-08
	Mode 1	0.00130	0.00050	2.460	1.60E-02
	Mode 5	0.00374	0.00100	2.910	4.70E-03
	Prediction Model Summary:
	Degree of Freedom: 77, RMSE: 1.66, Adjusted R2: 0.13
	F-statistic vs constant model: 7.01, P-value: 0.0016
	Femoral Cartilage	SHOMRI Score
		Estimate	SE	tStat	P value
	Intercept	1.93350	0.26695	7.243	2.87E-10
	Mode 1	0.00203	0.00086	2.370	2.03E-02
	Mode 5	0.00477	0.00178	2.680	9.00E-03
	Prediction Model Summary:
	Degree of Freedom: 77, RMSE: 2.39, Adjusted R2: 0.12
	F-statistic vs constant model: 6.018, P-value: 0.0032

Table 3B
SHOMRI Prediction Model Obtained including Demographics (age, gender, BMI)	Acetabular Cartilage	SHOMRI Score
		Estimate	SE	tStat	P value
	Intercept	−3.83200	1.28540	−2.981	3.84E-03
	Age	0.04532	0.01159	3.909	1.98E-04
	BMI	0.11580	0.05067	2.286	2.50E-02
	Prediction Model Summary:
	Degree of Freedom: 77, RMSE: 1.38, Adjusted R2: 0.13
	F-statistic vs constant model: 11.1, P-value: 5.78E-05
	Femoral Cartilage	SHOMRI Score
		Estimate	SE	tStat	P value
	Intercept	−2.07990	0.87471	−2.378	1.99E-02
	Age	0.08597	0.01811	4.748	9.48E-06
	Mode 1	0.00411	0.00266	−1.546	1.26E-01
	Age*Mode1	0.00013	0.00006	2.286	2.51E-02
	Prediction Model Summary:
	Degree of Freedom: 77, RMSE: 2.15, Adjusted R2: 0.28
	F-statistic vs constant model: 11.3, P-value: 3.4E-06

Table 3C
SHOMRI Prediction Model Obtained Including MRI-based shape feature and x-Ray geometrical measurements	Acetabular Cartilage	SHOMRI Score
		Estimate	SE	tStat	P value
	Intercept	1.01670	0.16819	6.045	4.83E-08
	Mode 1	0.00122	0.00054	2.256	2.69E-02
	Prediction Model Summary:
	Degree of Freedom: 80, RMSE: 1.5, Adjusted R2: 0.05 F-statistic vs constant model: 5.09.1, P-value: 0.0269
	Intercept	−1.33590	0.64198	−2.081	4.08E-02
	Alpha Angle	0.03976	0.01090	3.649	4.81E-04
	Mode 5	−0.01059	0.00449	−2.360	2.09E-02
	Alpha Angle*Mode 5	0.00023	0.00008	2.960	4.11E-03
	Prediction Model Summary:
	Degree of Freedom: 80, RMSE: 1.35, Adjusted R2: 0.23 F-statistic vs constant model: 9.2, P-value: 2.88E-05
	Femoral Cartilage	SHOMRI Score
		Estimate	SE	tStat	P value
	Intercept	20.73900	7.17090	2.892	4.97E-03
	Neck Sheft Angle	0.14368	0.05480	−2.622	1.05E-02
	Mode 1	0.00175	0.00086	2.031	4.57E-02
	Prediction Model Summary:
	Degree of Freedom: 80, RMSE: 2.39, Adjusted R2: 0.11 F-statistic vs constant model: 6.02, P-value: 0.00371
	Intercept	−1.56780	1.10850	−1.414	1.61E-01
	Alpha Angle	0.06200	0.01889	3.282	1.54E-03
	Prediction Model Summary:
	Degree of Freedom: 80, RMSE: 2.39, Adjusted R2: 0.11 F-statistic vs constant model: 10.8, P-value: 0.00154