Imaging metrics per patient age quartilea
| Quartile 1 | Quartile 2 | Quartile 3 | Quartile 4 | P Value | |
|---|---|---|---|---|---|
| LR-SR visible on T1W1b | 96% | 99% | 95% | 90% | .03 |
| LR-SR continuousc | 95% | 96% | 95% | 91% | .40 |
| LR-SR bowingd | 19% | 17% | 28% | 34% | .03 |
| LLA visiblee | 73% | 77% | 89% | 87% | .01 |
Note:—LLA indicates lateral levator aponeurosis.
↵a Quartile 1: 9–39 years of age; quartile 2: 40–49 years of age; quartile 3: 50–61 years of age; quartile 4: 62–81 years of age.
↵b The percentage of cases in which the LR-SR band was visible on T1WI.
↵c The percentage of cases in which the LR-SR band was visible as a continuous structure extending from the superior muscle complex to the lateral rectus muscle (ie, no gaps or discontinuities).
↵d The percentage of cases in which the LR-SR band demonstrated superotemporal bowing.
↵e The percentage of cases in which the lateral levator aponeurosis was visible, distinct from the LR-SR band.