Table 2.
Summary of dGEMRIC T1 values and mixed model estimated slopes for all patients (n = 37) representing the change in T1 (msec) for each time point by superficial and deep zone
| Time point | Superficial zone | Deep zone | |||
|---|---|---|---|---|---|
| Mean | (± SD) | Mean | (± SD) | p value | |
| Preoperative | 480 | (± 137) | 574 | (± 142) | < 0.001 |
| Year 1 | 409 | (± 119) | 526 | (± 140) | < 0.001 |
| Year 2 | 451 | (± 115) | 537 | (± 121) | < 0.001 |
| Change* | [95% CI] | p value | Change* | [95% CI] | p value | |
|---|---|---|---|---|---|---|
| Preoperative to Year 1 | −70 | [−87 to −54] | < 0.001 | −48 | [−66 to −30] | < 0.001 |
| Year 1 to Year 2 | 49 | [34–65] | < 0.001 | 18 | [5–32] | 0.008 |
| Preoperative to year 2 | −22 | [−40 to −4] | 0.02 | −36 | [−56 to −15] | < 0.001 |
*Change is the model-estimated change in T1 values between indicated time points; p values in the upper portion of the table describe the significance of the difference between superficial and deep zone measurements and p values in the lower portion of the table describe the significance of the change in T1 measurement estimated by the mixed model(s); dGEMRIC = delayed gadolinium-enhanced MRI of cartilage; CI = confidence interval.