Table 1 Characteristics of patients.

From: Low occupancy rate of the pedicle screw in the vertebral body leads to upper instrumented vertebral fracture

 

Fracture (F)

No fracture (NF)

P value

Number of patients

58 (18.2)

260 (81.8)

 

Age (years)

70.8 ± 6.4

64.7 ± 14.0

0.000***

Female (%)

46 (79.3)

215 (82.7)

0.545

T-score (F:NF = 37:136)

− 1.7 ± 1.5

− 1.5 ± 1.1

0.501

UIV

9.1 ± 2.0

9.0 ± 2.4

0.654

LIV

18.6 ± 1.4

18.1 ± 1.6

0.042*

Osteoporosis drugs (%)

27 (46.6)

91 (35.0)

0.103

Mental disease drugs (%)

5 (8.6)

31 (11.9)

0.474

Diabetes drugs (%)

11 (19.0)

10 (3.8)

0.006**

Anti-rheumatic drugs (%)

2 (3.4)

8 (3.1)

0.884

Steroid drugs (%)

6 (10.3)

5 (1.9)

0.046*

Cancer drugs (%)

1 (1.7)

2 (0.8)

0.498

Anti-Parkinson drugs (%)

8 (13.8)

14 (5.4)

0.083

  1. Data are presented as n (%) or mean ± standard deviation.
  2. A numerical value has been attributed to each vertebral level as follows: 1 = T1, 2 = T2, 12 = T12, 13 = L1, 17 = L5, 18 = S1, 19 = ilium.
  3. UIV upper instrumented vertebra, LIV lower instrumented vertebra.
  4. *P < 0.05; **P < 0.01; ***P < 0.001.
Back to article page