Table 1 Comparison of general condition and surgical condition of tibial fracture internal fixation surgery

Age (year), mean ± SD

75.18±3.53

73.77±4.26

0.239

Sex (female/male)

10/12

11/11

0.763

Body mass index (kg.m^-2 ), mean ± SD

25.82±3.61

26.74±4.06

0.434

Education level (year), median and 25–75 percentile

9 (7.75-13.25)

11 (10-13)

0.114

ASA physical status (I/II)

16/6

12/10

0.610

Preoperative MMSE scores , median and 25–75 percentile

27 (25-28)

27 (25-28)

0.321

Duration of anesthesia (min) , mean ± SD

141.36±12.45

146.36±14.97

0.235

Duration of surgery (min) , mean ± SD

122.5±11.52

126.14±11.12

0.293

Intraoperative blood loss (ml) , mean ± SD

123.41±12.38

117.73±10.77

0.112

Postoperative the highest MDAS (score) , mean ± SD

20.32±5.63

9.59±4.23

<0.001

Postoperative the highest VAS (score) , median and 25–75 percentile,

2 (1-3)

3 (2-4)

0.413