Table 4.

Risk factors for postoperative limb mechanical axis alignment (multivariate analysis)

Risk factor	p value	Odds ratio	95% CI for odds ratio
Preoperative knee deformity
Varus < 10°	Reference	Reference	Reference
Varus 10°–20°	0.06	0.20	0.04–1.06
Varus > 20°	0.03	0.16	0.03–0.85
Valgus < 10°	0.15	0.27	0.04–1.60
Valgus > 10°	0.15	0.27	0.02–1.82
Femoral bowing
< 5°	Reference	Reference	Reference
> 5°	0.05	0.55	0.30–1.0
Joint divergence angle
< 15°	Reference	Reference	Reference
> 15°	0.18	0.67	0.38–1.19
Tibial bone loss
< 20 mm	Reference	Reference	Reference
> 20 mm	0.57	0.44	0.19–1.02
Tibial subluxation
< 20%	Reference	Reference	Reference
> 20%	0.86	0.94	0.50–1.77