Table 1: Correlation between the ultrasonographic and radiographic measurements of the medial joint space.

Ultrasonography Radiography Correlation Coefficient P-value
Throwing side 4.2 ± 0.9 mm 4.8 ± 0.8 mm 0.547 0.0009
Non-throwing side 3.3 ± 1.0 mm 3.8 ± 1.1 mm 0.296 0.10
Increase in the MJS* 0.9 ± 0.5 mm 1.0 ± 0.6 mm 0.348 0.05

* Increase in the MJS (medial joint space) on the throwing side.