Table 1 Patient demographics and pre-operative details of the study population

Number of patients

406

Age (years)

70.2 ± 9.4

Range 45–93

Gender (%)

51.5% female

48.5% male

Body mass index (kg/m²)

29.0 ± 4.7

Range 18.1–47.1

Side

51.9% Right

48.1% Left

Pre-operative deformity (%)

77.4% Varus

22.6% Valgus

Pre-operative mechanical alignment (°)

3 varus ± 5.4

Range 12 varus to 17 valgus

Pre-operative extension (°)

5.6 ± 6.3

Range -23–30

Pre-operative flexion (°)

125 ± 10.6

Range 80–149