Correlations between MRI and ultrasound methods
| Ultrasound, distance between the right corresponding mammillary processes | Ultrasound, distance between the left corresponding mammillary processes | Ultrasound, distance between the corresponding spinous processes | |
| MRI, L2–L5 | 0.046 (−0.542 to 0.604), p=0.887 | −0.008 (−0.579 to 0.569), p=0.981 | 0.677 (0.169 to 0.901), p=0.016* |
| MRI, AvLx | 0.057 (−0.534 to 0.611), p=0.860 | −0.166 (−0.675 to 0.451), p=0.607 | 0.596 (0.034 to 0.872), p=0.041* |
| MRI, L2/L3 | 0.008 (−0.569 to 0.579), p=0.981 | −0.417 (−0.800 to 0.206), p=0.177 | 0.508 (−0.093 to 0.838), p=0.092 |
| MRI, L3/L4 | 0.139 (−0.472 to 0.660), p=0.666 | 0.181 (−0.438 to 0.684), p=0.574 | 0.358 (−0.271 to 0.773), p=0.253 |
| MRI, L4/L5 | −0.171 (−0.678 to 0.447), p=0.595 | −0.081 (−0.626 to 0.517), p=0.804 | 0.365 (−0.264 to 0.776), p=0.244 |
Data are Pearson correlation coefficient, (95% CI) and p value.
L2–L5: total distance from the posterior superior border of L2/L3 to the inferior border of L4/L5.
*P<0.05.
AvLx, average disc height across L2/L3, L3/L4 and L4/L5.