Table 6.
Analysis of the demographic factors of nonunion cases
| Characteristic | Nonunion (n = 6) | Union (n = 21) | p-value† |
|---|---|---|---|
| Age (yr) | 69.83 ± 2.23 | 71.43 ± 6.45 | 0.562 |
| Sex | |||
| Male | 2 (33.3) | 8 (23.8) | 1.000 |
| Female | 4 (66.7) | 16 (76.2) | |
| Height (cm) | 155.93 ± 16.31 | 152.95 ± 6.31 | 0.492 |
| Weight (kg) | 59.38 ± 11.28 | 58.90 ± 11.60 | 0.929 |
| BMD (T-score) | 0.27 ± 2.20 | 0.02 ± 1.53 | 0.758 |
| Smoking | 5 (83.3) | 2 (9.5) | 0.001* |
| Drinking | 3 (50.0) | 2 (9.5) | 0.056 |
| No. of fused levels | |||
| 3 Levels | 0 (0) | 8 (38.1) | 0.171 |
| 4 Levels | 1 (16.7) | 3 (14.3) | |
| 5 Levels | 5 (83.3) | 10 (47.6) | |
| Fusion levels | |||
| L1‒4 | 0 (0) | 2 (9.5) | 0.757 |
| L2‒5 | 0 (0) | 2 (9.5) | |
| L3‒S1 | 0 (0) | 4 (19.1) | |
| L1‒5 | 0 (0) | 1 (4.8) | |
| L2‒S1 | 1 (16.7) | 2 (9.5) | |
| L1‒S1 | 5 (83.3) | 10 (47.6) | |
| Fused levels per patient (level) | 4.83 | 4.10 | - |
Values are presented as mean±standard deviation or number (%) unless otherwise indicated.
BMD, bone mineral densitometry.
*
p<0.05, statistically significant differences.
†
Two-sample t-test or Mann-Whitney U-test was used.