Table 1 Patient characteristics

Body mass index

31.36

SD ±2.78

Range 26–35

31.72

SD ±2.44

Range 26–35

31.20

SD ±2.86

Range 26–35

0.79

Preoperative flexion (°)

105.4

SD ±9.67

Range 90–120

109.8

SD ±10.25

Range 90–120

107.6

SD ±8.43

Range 95–120

0.23

Preoperative HKA angle (°)

170.84

SD ±5.04

Range 165–183

171.96

SD ±5.26

Range 172–180

174.4

SD ±4.79

Range 166–183

0.38