Table 4.

Comparisons of postoperative alignments in the navigated group of 182 knees stratified by anatomical feature severity*

Grade	mTFA	cFPA	cTPA
Femoral bowing angle	0.003†	NS†	NS†
Medial bowing (≥ 0°) (n = 20)	−0.2 (1.9)	−0.3 (1.0)	0.1 (1.1)
Mild lateral bowing (−5 ° ≤ < 0°) (n = 83)	−0.0 (2.2)	−0.3 ((1.2)	0.3 (1.2)
Severe lateral bowing (−10° ≤ < −5°) (n = 54)	−0.9 (2.7)	−0.3 (1.3)	−0.3 (1.2)
Very severe lateral bowing (< −10°) (n = 25)	−2.0 (2.9)	−1.0 (1.2)	0.2 (1.5)
Femoral condylar orientation	0.004†	0.004†	NS†
Valgus (≥ 0°) (n = 41)	−0.0 (2.4)	−0.1 (1.3)	0.0 (1.3)
Mild varus (−3° ≤ < 0°) (n = 95)	−0.3 (2.3)	−0.3 (1.3)	0.1 (1.3
Severe varus (< −3°) (n = 46)	−1.7 (1.9)	−0.9 (0.9)	0.1 (1.2)
Tibia plateau inclination	0.001†	NS†	NS†
Valgus (≥ 0°) (n = 1)	3.0 (NA)	0.0 (NA)	2.0 (NA)
Mild varus (−3° ≤ < 0°) (n = 18)	1.7 (1.4)	−0.1 (1.0)	0.1 (1.0)
Severe varus (−5° ≤ < −3°) (n = 28)	0.8 (2.2)	−0.1 (1.3)	0.3 (1.3)
Very severe varus (< −5°) (n = 135)	−1.0 (2.6)	−0.5 (1.2)	0.0 (1.3)

* Data are mean angles with SDs in parentheses; ^†the significances of differences between subgroups were determined by analysis of variance with Bonferroni’s post hoc test. Values significantly different from others after post hoc testing are displayed in bold font; mTFA = mechanical tibiofemoral angle; cFPA = coronal femoral prosthesis alignment; cTPA = coronal tibial prosthesis alignment; NS = not significant; NA = not applicable.