Table 5.
Outcome measurements stratified by cohort
| Variable | pMRI (n = 25) | CT (n = 25) | p value* |
|---|---|---|---|
| 1-year followup | |||
| IHDI grade, number of hips greater than 1 (%) | 3 (12) | 8 (32) | 0.171 |
| Acetabular index, mean degrees (SD) | 28.0 (± 4.6) | 29.1 (± 3.7) | 0.384 |
| AVN (%) | 1 (4) | 6 (24) | 0.098 |
| Final followup | |||
| IHDI grade, number of hips greater than 1 (%) | 1 (4) | 3 (12) | 0.609 |
| Acetabular index, mean degrees (SD) | 25.4 (± 4.6) | 24.6 (± 4.2) | 0.543 |
| AVN (%) | 1 (4) | 7 (28) | 0.048 |
| Further corrective surgery, number of hips (%) | 2 (8) | 5 (20) | 0.417 |
| Redislocation following successful initial closed reduction, number of hips (%)† | 1 (4) | 0 | 1.000 |
* p values correspond to intergroup differences based on the Fisher’s exact test for categorical variables and Student’s t-test for continuous variables; †patient retained in pMRI group for further analysis after successful repeat closed reduction; pMRI = perfusion MRI; IHDI = International Hip Dysplasia Institute criteria; AVN = avascular necrosis.