Table 3.

Radiographic results including patella height

	Hemophilia	Rheumatoid arthritis	p-Value
Number of knees	48	92
Mechanical axis (°)a
Preoperative	Valgus 0.7 ± 8.6 (−18.6 to 17.4)	Varus 5.4 ± 8.9 (−23.9 to 24.9)	< 0.001
Varus knees (n = 24/72)	Varus 6.4 ± 4.7 (−18.6 to −1.0)	Varus 9.0 ± 5.3 (−23.9 to −0.9)	0.036
Valgus knees (n = 24/20)	Valgus 7.8 ± 4.9 (1.1–17.4)	Valgus 7.6 ± 6.7 (0.5–24.9)	0.913
Postoperative	Valgus 0.6 ± 2.3 (−4.2 to 5.2)	Valgus 0.3 ± 1.9 (−3.8 to 4.8)	0.467
Aligned knees with mechanical axis of ≤ ±3°	39	84	0.084
Outlier of > ±3°	9	8
Position of components (°)
α angle	95.9 ± 1.7 (93.1–100.9)	95.9 ± 1.7 (92.2–102.1)	0.990
β angle	89.7 ± 1.4 (86.6–92.4)	90.5 ± 1.6 (87.1–93.7)	0.206
γ angle	4.6 ± 2.2 (0.8–8.9)	3.2 ± 1.8 (0.5–8.4)	0.105
δ angle	87.7 ± 2.4 (82.4–91.8)	87.3 ± 2.1 (81.3–92.3)	0.248

^aNegative values represent varus alignment; positive values indicate valgus alignment of the knee