Table 1 Baseline characteristics of included patients

Gender (male/female)

29/22

36/25

Age (x ± s, years old)

55.6 ± 14.2

50.6 ± 19.2

Body weight (x ± s, Kg)

61.2 ± 9.5

61.8 ± 8.5

Primary diseases

 Femoral neck fracture

14

15

 Ischemic necrosis of femoral head

6

9

 Hip osteoarthritis

7

9

 Knee joint osteoarthritis

11

15

 Femoral dysplasia

13

13

Anesthesia method

 General anesthesia in the trachea

45

51

 Continuous epidural anesthesia

6

10

Prosthesis fixation

 Non-cement fixation

7

9

 Cement fixation

32

36

 Mixed fixation

12

16