Table 2.
Segment-specific facet joint translations at the upright standing position with respect to the fully flexed position. Median (confidence interval range based on ±CInotch).
| (a) X (facet gap) (mm) |
(b) Y (SI sliding) (mm) |
(c) Z (sideways sliding) (mm) |
|||||||
|---|---|---|---|---|---|---|---|---|---|
| Segment | Left | Right | Average | Left | Right | Average | Left | Right | Average |
| L2-L3 | 0.59 a (0.30 – 0.87) | −0.10 bc (−0.28 to 0.08) | 0.19 ac (0.04–0.33) | −5.66 a (−6.39 to −4.92) | −6.07 a (−6.71 to −5.42) | −5.92 a (−6.56 to −5.28) | −0.56 a (−0.76 to −0.37) | −0.72 a (−0.91 to −0.53) | −0.68 a (−0.81 to −0.55) |
| L3-L4 | 0.32 a (0.17–0.46) | −0.29 b (−0.40 to −0.17) | 0.03 c (−0.07 to 0.12) | −5.97 a (−6.58 to −5.36) | −6.06 a (−6.59 to −5.52) | −6.34 a (−6.91 to −5.78) | −0.60 a (−0.84 to −0.36) | −0.65 a (−1.15 to −0.14) | −0.73 a (−1.12 to −0.34) |
| L4-L5 | 0.30 a (−0.01 to 0.61) | 0.39 ac (0.05–0.72) | 0.44 a (0.23–0.66) | −6.51 a (−7.03 to −6.00) | −6.11 a (−6.80 to −5.43) | −6.59 a (−7.24 to −5.94) | −1.17 b (−1.43 to −0.92) | −1.56 b (−1.95 to −1.17) | −1.45 b (−1.76 to −1.14) |
| L5-S1 | 0.45 a (0.17–0.74) | 0.46 ac (0.07–0.86) | 0.41 a (0.17–0.65) | −3.98 b (−4.70 to −3.25) | −3.01 b (−3.58 to −2.43) | −3.48 b (−4.07 to −2.89) | −1.61 b (−2.27 to −0.96) | −1.03 ab (−1.50 to −0.57) | −1.63 b (−1.95 to −1.30) |
Note: Within each component, values with one or more like superscripts (a, b, c, d) across side (left, right, average) or across segment level (L2L3, L3L4, L4L5, L5S1) indicates no significant differences. Dissimilar superscripts indicate significant differences.