Importance of computed tomography in posterior malleolar fractures: Added information to preoperative X-ray studies

Table 4 Relationship between the size of the posterior malleolus and the affected articular surface according to the Haraguchi classification

Classification	Haraguchi
	I	II	III	P value
Cases (%)	29 (35.8)	33 (40.7)	19 (23.4)	N/A
X-ray
PM size % (PMXR)	21.66a (± 9.91)	24.84a (± 9.03)	12.45 (± 4.17)	< 0.001
CT
Articular surface of the tibial plafond % (AXCT)	12.24 (± 5.47)	22.80 (± 8.28)	3.84 (± 2.78)	< 0.001

^aThere was a statistically significant difference only when compared to Haraguchi III. There was no significant difference between Haraguchi I and II; there was a statistically significant difference when all categories were compared. The P < 0.001 value was found when comparing the three groups and indicates a significant statistical difference. AXCT: Axial computed tomography slice of the posterior malleolus; CT: Computed tomography; N/A: Not applicable; PM: Posterior malleolus; PMXR: Profile X-ray images of the posterior malleolus.