Table 3.
Effect of clinical experience and each factor on fractioned ROSA usage period
| Fix factor | Step 1 |
Step 2 |
Step 3 |
Step 4 |
Total time |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| F-value | β-value | p-value | F-value | β-value | p-value | F-value | β-value | p-value | F-value | β-value | p-value | F-value | β-value | p-value | |
| Clinical experience | 1.18 | - | 0.32 | 4.37 | - | < 0.01 | 6.69 | - | < 0.01 | 5.11 | - | < 0.01 | 9.99 | - | < 0.01 |
| Age | 0.41 | 0.07 | 0.52 | 0.58 | -0.05 | 0.45 | 0.03 | -0.01 | 0.86 | 0.65 | -0.06 | 0.42 | 0.01 | 0.02 | 0.91 |
| Female sex | 0.02 | -0.34 | 0.89 | 0.02 | -0.21 | 0.89 | 3.08 | 2.24 | 0.08 | 0.13 | -0.62 | 0.72 | 0.32 | 2.23 | 0.57 |
| BMI | 0.11 | 0.09 | 0.74 | 1.68 | 0.20 | 0.20 | 0.38 | -0.08 | 0.54 | 17.86 | 0.76 | < 0.01 | 6.74 | 1.11 | 0.01 |
| BMD | 0.81 | 0.68 | 0.37 | 1.77 | -0.58 | 0.19 | 0.46 | 0.25 | 0.50 | 1.57 | 0.64 | 0.21 | 1.03 | 1.15 | 0.31 |
| Screw numbers | 1.51 | - | 0.23 | 0.05 | - | 0.95 | 11.10 | - | < 0.01 | 23.51 | - | < 0.01 | 11.31 | - | < 0.01 |
| 4 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 6 | - | -4.16 | 0.22 | - | -0.10 | 0.96 | - | 5.50 | < 0.01 | - | 9.59 | < 0.01 | - | 10.39 | 0.04 |
| 8 | - | -18.46 | 0.07 | - | 4.84 | 0.42 | - | 6.55 | 0.21 | - | 23.91 | < 0.01 | - | 17.29 | 0.29 |
| T spine involvement | 8.81 | 19.28 | 0.00 | 0.00 | -0.18 | 0.96 | 0.02 | 0.43 | 0.89 | 4.09 | 8.95 | 0.05 | 7.90 | 28.92 | 0.01 |
| Presence of scoliosis | 2.84 | -6.98 | 0.06 | 0.09 | -1.60 | 0.36 | 0.22 | 0.54 | 0.64 | 3.06 | -3.05 | 0.08 | 0.03 | -10.69 | 0.86 |
| Presence of spondylolisthesis | 1.18 | -3.13 | 0.33 | 0.28 | 2.06 | 0.69 | 0.00 | -1.24 | 0.99 | 0.00 | -1.67 | 0.98 | 0.50 | -1.14 | 0.48 |
BMI, body mass index; BMD, bone mineral density.