Table 3 Comparison of admission data between survival and mortality groups 1 year postoperatively

Patient background

 Age, years

74.5 ± 6.3

76.6 ± 5.4

0.07

 Gender (male / female), n

179 / 109

22 / 3

0.01*

 Height, cm

274

158.7 ± 9.7

24

161.5 ± 9.9

0.19

 Weight, kg

277

55.7 ± 10.3

24

56.8 ± 10.8

0.78

Pre-trauma walking capacity, n

 Independent / T-cane / walker / inability to walk

269 / 12 / 3 / 4

22 / 1 / 2 / 0

0.14

 Charlson comorbidity index

282

0.5 ± 1.0

1.3 ± 1.6

 < 0.01*

Blood test data, g /dL

 Albumin

247

3.7 ± 0.5

20

3.6 ± 0.4

0.16

 Hemoglobin

285

12.7 ± 1.9

24

12.1 ± 2.3

0.33

Level of fracture, n (%)

 C1‒2

93 (32)

5 (20)

0.20

 C3‒5

102 (35)

11 (44)

0.39

 C6‒7

130 (45)

14 (56)

0.30

Facet interlocking, n (%)

81 (28)

8 (32)

0.68

ASIA Impairment Scale, n (%)

 < 0.01*

 A / B / C / D / E

287

15 (5) /12 (4) / 41 (14) / 73 (25) / 146 (51)

12 (48) / 2 (8) / 2 (8) / 1 (4) / 8 (32)

Comorbid major organ injury, n (%)

30 (10)

1 (4)

0.26

Surgery

 Anterior / Posterior / Combined, n (%)

28 (10) / 251 (87) / 9 (3)

2 (8) / 22 (88) / 1 (4)

0.94

 Number of fused segments

2.3 ± 1.7

3.0 ± 2.0

0.10

 Occipitocervical fusion, n (%)

15 (5)

1 (4)

0.63

 Surgical bleeding, mL

266

228 ± 304

22

481 ± 886

0.10

 Surgical time, min

268

171 ± 68

23

217 ± 83

 < 0.01*