Table 1 Baseline characteristics of the two groups included in this study

Age (years)^a

82.19 ± 3.96

80.88 ± 4.90

t = 1.235

0.221

Osteoporosis (T value)^a

−3.53 ± 0.75

−3.77 ± 0.90

t = 1.229

0.223

Preoperative preparation time (hours)^a

57.33 ± 11.87

54.35 ± 14.84

t = 0.931

0.355

Gender (male/female), n

16/20

16/18

χ² = 0.048

0.826

Fracture site (left/right), n

17/19

20/14

χ² = 0.944

0.331

AO classification, n

 31-A2.2

17

22

χ² = 2.166

0.141

 31-A2.3

19

12

ASA score, n

 III

15

16

χ² = 0.206

0.650

 IV

21

18

Basic diseases, n

 Respiratory

7

6

χ² = 0.037

0.847

 Cardiovascular

14

14

χ² = 0.038

0.845

 Urinary

3

2

χ² < 0.001^b

1.000

 Neurologic

6

10

χ² = 1.611

0.204

 Digestive

3

5

χ² = 0.213^b

0.644

 Endocrinium

9

8

χ² = 0.021

0.886

 Genital

2

3

χ² = 0.004^b

0.947