Table 5.
Comparison between sacral insufficiency fracture patients whose LIV was S1 (LIV=S1) and those whose LIV was L5 and/or upper (LIV ≥L5)
| Variable | LIV=S1 (n=12) | LIV ≥L5 (n=8) | p-value |
|---|---|---|---|
| Age (yr) | |||
| 50–59 | 2 | 3 | 0.54 |
| 60–69 | 3 | 1 | |
| 70–79 | 6 | 4 | |
| ≥80 | 1 | 0 | |
| Body mass index (kg/m2) | |||
| Under-weight (<18.5) | 0 | 1 | 0.47 |
| Normal (18.5–24.9) | 5 | 4 | |
| Over-weight (25.0–29.9) | 5 | 2 | |
| Dual-energy X-ray absorptiometry | |||
| Bone mineral density (g/cm2) | 0.71±0.11 | 0.67±0.12 | 0.49 |
| T-score | −2.78±0.66 | −2.59±0.33 | 0.42 |
| Screw hole involvement | 4 | 0 | NA |
Values are presented as number or mean±standard deviation.
LIV, lowest instrumented vertebra; NA, not applicable.