Table 3.
Spearman's rank correlations (r) between ultrasound medial (MED), sulcus (SULC), and lateral (LAT) bone depth level intensities and intensity slopes and radiographic K-L grading or arthroscopic Noyes' grading.
| K-L grading | Noyes' grading | |||||
|---|---|---|---|---|---|---|
| n | r | 95% CI | n | r | 95% CI | |
| MED level 1 | 31 | 0.457** | 0.122–0.698 | 38 | 0.162 | −0.166–0.458 |
| MED level 2 | 31 | 0.419* | 0.076–0.673 | 38 | 0.292 | −0.031–0.559 |
| MED level 3 | 31 | 0.373* | 0.021–0.642 | 38 | 0.192 | −0.136–0.482 |
| MED level 4 | 31 | 0.405* | 0.059–0.664 | 38 | 0.133 | −0.195–0.434 |
| MED level 5 | 31 | 0.232 | −0.133–0.542 | 38 | 0.115 | −0.213–0.419 |
| MED level all | 31 | 0.418* | 0.075–0.673 | 38 | 0.167 | −0.161–0.462 |
| MED slope | 31 | 0.360* | 0.006–0.634 | 38 | 0.325* | 0.006–0.584 |
| SULC level 1 | 30 | 0.244 | −0.128–0.555 | 38 | −0.022 | −0.339–0.300 |
| SULC level 2 | 30 | 0.541** | 0.224–0.754 | 38 | 0.372* | 0.059–0.618 |
| SULC level 3 | 30 | 0.390* | 0.035–0.658 | 38 | 0.462** | 0.167–0.681 |
| SULC level 4 | 30 | 0.202 | −0.171–0.524 | 38 | 0.242 | −0.084–0.521 |
| SULC level 5 | 30 | 0.201 | −0.172–0.523 | 38 | 0.282 | −0.041–0.552 |
| SULC level all | 30 | 0.394* | 0.039–0.661 | 38 | 0.358* | 0.043–0.608 |
| SULC slope | 30 | 0.482** | 0.147–0.718 | 38 | 0.427** | 0.124–0.657 |
| LAT level 1 | 31 | 0.109 | −0.255–0.446 | 38 | 0.029 | −0.293–0.345 |
| LAT level 2 | 31 | 0.117 | −0.248–0.452 | 38 | −0.038 | −0.353–0.285 |
| LAT level 3 | 31 | −0.179 | −0.501–0.187 | 38 | −0.091 | −0.399–0.236 |
| LAT level 4 | 31 | −0.080 | −0.422–0.282 | 38 | 0.063 | −0.262–0.375 |
| LAT level 5 | 31 | −0.009 | −0.362–0.347 | 38 | 0.093 | −0.234–0.401 |
| LAT level all | 31 | 0.062 | −0299–0.407 | 38 | 0.008 | −0.312–0.327 |
| LAT slope | 31 | −0.049 | −0.396–0.311 | 38 | −0.095 | −0.402–0.232 |
*P < 0.05.
**P < 0.01.