Table 1 Demographic and laboratory data of of patients requiring spinal surgery
From: A retrospective analysis of bone mineral status in patients requiring spinal surgery
|  | Mean (± SD) or n (%) |
|---|---|
n | 144 |
Sex (no. of female, %) | 96 (66.4) |
Mean age in yr | 70.1 (8.1) |
Age (no. of patients) | |
 50–60 yr | 18 (12.5%) |
 60–70 yr | 55 (38.2%) |
  > 70 yr | 71 (49.3%) |
Weight (kg) | 74.8 (14.4) |
Height (cm) | 168.0 (9.4) |
Height change (cm) | 3.7 (2.9) |
Mean BMI (± SD) | 26.2 (4.7) |
History of a vertebral fracture | 42 (29.1%) |
Unknown vertebral deformity (Diagnosed by VFA) | 12 (8.3%) |
Proton pump inhibitor use | 44 (30.6%) |
Laboratory values | |
 25-OH-D (ng/ml) | 24.3 (11.8) |
 Parathyroid hormone (ng/l) | 84.3 (47.1) |
 Calcium (mmol/l) | 2.23 (0.1) |
 Bone specific AP (μg/l) (n = 115) | 13.6 (7.9) |
 Osteocalcin (μg/l) (n = 111) | 18.9 (11.8) |
 Urine DPD (n = 107) | 6.7 (2.8) |
 Elevated DPD | 74 (69.2%) |
 Elevated Gastrin | 20 (13.9%) |