Table 1.
Univariate Analysis of Patient Characteristics.
| Overall | PJF (+) | PJF (−) | p-value# | |
|---|---|---|---|---|
| Number of patients | 403 | 63 | 340 | |
| Age | 73.8±7.8 | 74.9±8.1 | 73.6±7.8 | 0.238† |
| Sex | 0.724‡ | |||
| Women | 331 (82.1%) | 53 (84.1%) | 278 (81.8%) | |
| Men | 72 (17.9%) | 10 (15.9%) | 62 (18.2%) | |
| BMI | 22.6±4.4 | 22.5±3.9 | 22.6±4.5 | 0.872† |
| Follow up (months) | 45.7±20.7 | 45.0±20.1 | 45.8±20.8 | 0.772† |
| Osteoporosis grade | 0.019‡ | |||
| 0 | 25 (6.2%) | 2 (3.2%) | 23 (6.8%) | |
| I | 153 (38.1%) | 15 (23.8%) | 138 (40.6%) | <0.05* |
| II | 170 (42.3%) | 37 (58.7%) | 133 (39.1%) | <0.05* |
| III | 53 (13.2%) | 9 (14.3%) | 44 (12.9%) | |
| OVC level | 0.002‡ | |||
| T10 | 16 (4.0%) | 0 (0%) | 16 (4.7%) | |
| T11-L2 | 311 (77.2%) | 42 (66.7%) | 269 (79.1%) | <0.05* |
| L3-L5 | 76 (18.9%) | 21 (33.3%) | 55 (16.2%) | <0.05* |
#: p-value calculated by the comparison between groups with and without PJF
†: t-test, ‡: Chi-square test, *: post-hoc residual analysis
PJF: proximal junctional fracture, BMI: body mass index, OVF: osteoporotic vertebral collapse