Table 1 Patients’ clinical and demographic characteristics

Age (years)

64.2 ± 8.5

65.9 ± 9.0

0.350^a

Sex (M/F)

13/32

9/36

0.327^b

Weight (kg)

61.4 ± 5.3

63.9 ± 10.1

0.147^a

Height (cm)

155.6 ± 6.1

155.7 ± 7.4

0.968^c

Body mass index (kg/m²)

25.5 ± 3.0

26.4 ± 3.8

0.249^a

Side of surgery (right/left)

27/18

22/23

0.290^b

VAS pain score (prior to surgery)

4.47 ± 0.84

4.27 ± 0.75

0.304^c

Knee ROM (prior to surgery)

111.1 ± 13.8

114.4 ± 12.6

0.211^c

Quadriceps strength

4.9 ± 0.3

4.9 ± 0.3

0.505^c

ASA status (I/II/III)

2/35/8

1/30/14

0.127^c

Time of surgery (min)

64.2 ± 8.3

61.7 ± 7.0

0.132^a