Table 1.
Comparisons of clinical parameters between three groups in the coronal plane
| Group HV (n = 21) | Group HV-UEV (n = 29) | Group UEV (n = 45) | P value | |
|---|---|---|---|---|
| Age (years) | 57.2 ± 7.2 | 58.3 ± 6.1 | 59.2 ± 4.8 | 0.88 |
| Sex ratio (M/F) | 9:12 | 11:18 | 17:28 | 0.79 |
| BMI (kg/m2) | 22.7 ± 4.7 | 23.1 ± 3.9 | 23.2 ± 4.1 | 0.99 |
| No. of fused levels | 7.4 ± 0.8 | 5.8 ± 1.4 | 4.0 ± 0.9 | 0.00 |
| Operation time (h) | 5.5 ± 0.8 | 4.2 ± 1.2 | 3.8 ± 1.1 | 0.01 |
| Blood loss (ml) | 1240 ± 210 | 780 ± 180 | 690 ± 120 | 0.02 |
| In-bed time (d) | 9.6 ± 1.2 | 6.1 ± 0.8 | 5.7 ± 1.1 | 0.04 |
| Hospital stays (d) | 21.2 ± 3.3 | 15.8 ± 2.4 | 14.1 ± 1.2 | 0.01 |
| Pre-op ODI | 34.9 ± 9.6 | 33.2 ± 7.8 | 32.9 ± 7.7 | 0.09 |
| Post-op ODI | 13.2 ± 6.9 | 12.5 ± 5.9 | 11.1 ± 4.8 | 0.66 |
BMI indicates body mass index; Pre-op indicates pre-operative; Post-op indicates post-operative.