Table 1.

Patients demographics and surgical details

Gender: male/female ratio	24/76
Age (mean, range, SD)	67.4, 44.5–87.5, 10.0
BMI (mean, range, SD)	32.3, 21.8–53.9, 6.3
Diagnosis
Primary OA	97%
Post-traumatic OA	3%
Surgical time (mean, range, SD)	56.2, 36–101, 12.0
Patella resurfaced %	55

Radiographic measurements	Pre-operative	Post-operative	p value
HKA (mean, range, SD)	− 1.4, − 10.5–10.0, 4.1	− 0.9, − 4.4–3.3, 2.0	p = 0.203
LDFA (mean, range, SD)	91.8, 86.0–99.0, 2.7	92.3, 87.2–95.4, 1.8	p = 0.091
MPTA (mean, range, SD)	86.7, 79.9–85.4, 2.6	86.8, 84.2–0.0, 1.5	p = 0.951

BMI body mass index, HKA arithmetic mechanical hip–knee–ankle angle (LDFA + MPTA), negative values represent a varus alignment, LDFA lateral distal femoral angle (mechanical), MPTA medial proximal tibial angle (mechanical), OA osteoarthritis, SD standard deviation from the mean