Table 2. Correlation between Koyama et al's¹⁵ and Ahmad et al's¹⁶ classifications based on the average and maximum changes for condyle and glenoid fossa (Spearman's correlation coefficient).

Ahmad classification	Koyama classification
	Ave condylar changes	Max condylar changes	Ave glenoid fossa changes	Max glenoid fossa changes
Ave condylar changes	0.9341
Max condylar changes		0.7694
Ave glenoid fossa changes			0.8308
Max glenoid fossa changes				0.7754

Ave, average; Max, maximum.

p < 0.0001.