The risk of violating the posterior malleolar fracture when nailing the ipsilateral concomitant spiral distal tibial fracture

Table 3 Univariate analysis results for factors related to posterior malleolar fragment violation of S₁₃ and S₁₅

Clinical features	S₁₃		p-value	S₁₅		p-value
Clinical features	PMF spared	PMF disrupted	p-value	PMF spared	PMF disrupted	p-value
FAR (%)^a	0.14 (0.07–0.24)	0.24 (0.19–0.26)	0.004	0.14 (0.08–0.24)	0.24 (0.19–0.27)	0.003
HP (mm)	27.23 (23.6–0.71)	37.22 (33.12–41.03)	< 0.001	28.16 (24.69–30.98)	37.22 (33.17–41.24)	< 0.001
Bartoníček’s classification^b			0.004			0.015
Type 2	9	0		9	9
Type 3	3	4		3	4
Type 4	15	24		19	20

Posterior malleolar fragment (PMF), height of posterior malleolar fragment (HP), fragment area ratio (FAR)
^aThe values are given as the median with Q25 and Q75. ^bThe values are given as the number of patients