Table 3.
Association of fusion outcomes with vitamin D level, calcium level, and preoperative characteristics in patients with bony fusion after spinal fusion surgery
| Time to fusion (day) | ODI, postop 3 m | ODI, postop 6 m | VAS, postop 3 m | VAS, postop 6 m | |
|---|---|---|---|---|---|
| BMI (kg/m2) | 0.166 | 0.142 | 0.393* | 0.061 | 0.269 |
| BMD (g/cm2) | 0.022 | 0.182 | 0.143 | -0.028 | 0.169 |
| Number of fused vertebrae | 0.126 | 0.159 | 0.096 | -0.003 | -0.079 |
| Operation time (min) | 0.011 | -0.043 | -0.082 | -0.035 | -0.087 |
| 25(OH)VitD, preop (ng/ml) | -0.582** | 0.065 | 0.018 | -0.050 | 0.031 |
| 25(OH)VitD, postop 3 m (ng/ml) | -0.489** | -0.117 | -0.170 | -0.260 | -0.204 |
| 25(OH)VitD, postop 6 m (ng/ml) | -0.496** | -0.176 | -0.182 | -0.252 | -0.242 |
| Calcium, preop (mg/dl) | 0.063 | -0.144 | -0.07 | -0.013 | -0.019 |
Abbreviation: BMI Body mass index, BMD Bone mineral density, ODI Oswestry Disability Index, VAS Visual analogue scale, preop preoperative; postop, postoperative, 3 m three months, 6 m six months
*P < 0.05
**P < 0.01