Mean difference | SE | P value† | 95% confidence interval for difference | ||
---|---|---|---|---|---|
Lower bound | Upper bound | ||||
Posterior (spinal canal occlusion) | |||||
1 and 3‡ | 0.973 | 0.456 | .051 | −0.004 | 1.950 |
2 and 1 | 0.046 | 0.277 | .870 | −0.548 | 0.640 |
2 and 3 | 1.019 | 0.421 | .030 | 0.116 | 1.922 |
Posterolateral (intervertebral foramen occlusion) | |||||
1 and 2 | −1.637 | 0.580 | .014 | −2.880 | −0.393 |
1 and 3 | −3.458 | 1.389 | .026 | −6.439 | −0.478 |
2 and 3 | −1.822 | 1.619 | .280 | −5.295 | 1.651 |