Table 1 Demographic data of two groups (mean ± SD, range)

Patients(n)

46

40

Left/right(n)

22/24

20/20

Age(year)

70.28 ± 7.03(53–82)

69.23 ± 7.36(50–83)

Sex (male/female)

12/34

7/33

BMI(kg/m²)

26.75 ± 3.51(19.51–35.55)

26.47 ± 3.61(21.23–33.92)

Length of stay(day)

7.76 ± 2.07(5–16)

7.38 ± 2.26(5–16)

Operative time(min)

71.74 ± 20.63(45–140)

74.50 ± 22.08(50–160)

Hypertension

33

26

Diabetes

11

13

Cardiovascular disease

1

1

Complications

 Superficial infection

0

1

 Deep infection

0

0

 DVT

2

0

Main diagnosis

 Osteoarthritis

50

37

 Rheumatoid arthritis

1

2

 Traumatic arthritis

0

1

Thienpont’s Classification

 Type I and II

23

15

 Type III and IV

14

15

Ranawat’s Classification

 Type I

5

8

 Type II and III

4

2