Table 3: Mean values of patient-reported outcomes and radiographic parameters.
| Parameter |
Device |
Baseline |
6 Weeks |
3 Months |
6 Months |
12 Months |
| VAS Back Pain |
Expandable |
8.1 (0.7) |
3.9 (1.0)* |
3.2 (1.0)* |
2.3 (1.1)* |
1.6 (1.2)* |
| Static |
7.4 (1.8) |
2.8 (2.5)* |
2.3 (2.2)* |
3.0 (2.9)* |
2.2 (2.6)* |
| ODI |
Expandable |
77.3 (6.9) |
47.5 (14.5)* |
34.7 (12.3)* |
25.0 (13.0)* |
16.3 (11.7)* |
| Static |
50.5 (19.2) |
26.9 (17.0)* |
21.7 (15.2)* |
23.6 (18.0)* |
20.6 (19.7)* |
| Middle Disc Height (mm) |
Expandable |
6.4 (2.5) |
12.3 (2.2)* |
11.7 (2.4)* |
11.4 (2.3)* |
11.0 (2.2)* |
| Static |
8.8 (2.8) |
13.4 (2.4)* |
12.9 (2.7)* |
12.9 (2.6)* |
12.6 (2.9)* |
| Neuroforaminal Height (mm) |
Expandable |
14.1 (4.1) |
20.0 (3.8)* |
19.5 (3.6)* |
18.5 (3.4)* |
17.8 (3.0)* |
| Static |
20.2 (4.1) |
22.6 (4.1)* |
22.5 (3.8)* |
21.9 (4.1)* |
22.3 (3.8)* |
| Segmental Lordosis (°) |
Expandable |
4.7 (2.9) |
9.5 (3.4)* |
9.1 (3.1)* |
8.8 (3.0)* |
8.5 (2.6)* |
| Static |
14.7 (8.5) |
15.2 (8.1) |
15.0 (8.7) |
14.9 (8.3) |
14.4 (8.5) |
*P<0.05 compared to baseline. Mean (SD).