Table 1.
Comparison of the facet angle and tropism between the individuals with and without spondylolysis at L5 level.
| Individuals with spondylolysis (N=17) |
Individuals without spondylolysis (N=171) |
Comparison (p-value) ** |
|
|---|---|---|---|
| Age (years) | 56.29±11.19 | 52.22±10.69 | 0.1381 |
| BMI (kg/m2) | 27.82±3.51 | 27.90±5.20 | 0.9509 |
| Sex (females)(prevalence) | 3 (17.7%) | 77 (49.4%) | 0.0229 |
| Facet orientation L3-L4 Rt * | 36.88±9.45 | 37.53±8.74 | 0.7740 |
| Facet orientation L3-L4 Lt * | 37.94±11.34 | 38.19±9.40 | 0.9191 |
| Facet orientation L4-L5 Rt * | 45.59±10.64 | 45.24±10.68 | 0.8985 |
| Facet orientation L4-L5 Lt * | 49.06±7.81 | 47.39±10.69 | 0.5307 |
| Facet orientation L5-S1 Rt * | 48.24±11.65 | 46.97±11.29 | 0.6614 |
| Facet orientation L5-S1 Lt * | 50.53±6.91 | 49.17+13.19 | 0.4932 |
| Facet tropism (continuous) L3-L4 | 6.47±4.12 | 6.02±4.99 | 0.7214 |
| Facet tropism (continuous) L4-L5 | 6.53±5.94 | 6.98±6.16 | 0.7755 |
| Facet tropism (continuous) L5-S1 | 8.88±11.32 | 7.06±7.84 | 0.5256 |
*
Relative to sagittal plane.
**
Results of χ2 test for dichotomous variables and of t-test for continuous variables. Statistically significant association at p<0.05 level marked bold.