. 2014 May;9(3):329–337.

Table 3.

Hierarchical regression analysis of quadriceps strength after the strength training intervention

Factor	R²	Adj. R²	df	β	F Change	Sign. F Change
Sex	0.237	0.233	1,184	−0.487	57.244	<0.001
Sex				−0.511
+Age	0.276	0.268	1, 183	−0.199	9.857	0.002
Sex				−0.385
+Age				−0.180
+MVIC_IE	0.548	0.541	1, 182	0.536	109.495	<0.001
Sex				−0.378
+Age				−0.166
+MVIC_IE				0.543
+PainMVIC_IE	0.551	0.541	1, 181	0.052	0.971	0.317
Sex				−0.382
+Age				−0.168
+MVIC_IE				0.543
+PainMVIC_IE				0.056
+CAR_IE	0.551	0.538	1, 180	0.016	0.053	0.818

β = standardized coefficients; CAR = central activation ratio; MVIC= maximal voluntary contraction, IE= initial evaluation (post surgery), 3mos= 3 months after surgery