Table 4.

Multivariate Analysis Concerning Ethnicity, Sex, Alignment, and Posterior Tibial Slope^a

	Correlation Coefficient (R 2)	95% CI	P
GPPTA
Ethnicity	0.330	0.266 to 0.392	<.0001
Sex	0.077	0.006 to 0.146	.0332
HKA angle	–0.277	–0.341 to –0.277	<.0001
MPPTA
Ethnicity	0.395	0.334 to 0.452	<.0001
Sex	–0.0390	–0.109 to 0.031	.2769
HKA angle	–0.368	–0.427 to 0.306	<.0001
LPPTA
Ethnicity	0.111	0.041 to 0.179	.002
Sex	0.156	0.087 to 0.224	<.0001
HKA angle	–0.0018	–0.072 to 0.068	.9603

^aBolded P values indicate a statistical significance. GPPTA, global posterior plateau tibial angle; HKA, hip-knee-ankle; LPPTA, lateral posterior plateau tibial angle; MPPTA, medial posterior plateau tibial angle.