Morphological analysis of posterior malleolar fractures with intra-articular impacted fragment in computed tomography scans

Journal of Orthopaedics and Traumatology

Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 4 Univariate analysis results for the relation of IAIF

Variables	IAIF (n = 75)	NIAIF (n = 33)	Statistical values	P-Value
Age (> 60 years/ ≤ 60 years)	20/55	12/21	1.033	0.309^a
Gender (Male/Female)	20/55	14/19	2.638	0.104^a
Involvement of medial malleolus	22/53	3/30	5.278	0.022^a
Involvement of fibular notch	66/9	23/10	5.295	0.021^a
L_IFN/(L_IFN + L_SFN)*	0.27 ± 0.13	0.25 ± 0.13	−2.115	0.037^b
L_MPMF^#	7.30 (1.89–25.74)	5.40 (0.80–16.10)	−2.868	0.004^c
A_PMF^#	147.15(12.96–523.71)	95.60 (12.52–466.17)	−2.438	0.010^c
Haraguchi (1/2/3)^§			6.569	0.037^a
1	48	24
2	21	3
3	6	6
Mason (1/2A/2B/3)^§			7.886	0.038^a
1	6	6
2A	47	24
2B	20	2
3	2	1

IAIF intraarticular impacted fragments, NIAIF no intraarticular impacted fragments
^*Values are given as the mean ± SD
^#Values are given as the median, with the range in parentheses
^§Chi-square test of Haraguchi (1/2/3) (P = 0.037) and Mason (1/2A/2B/3) (P = 0.038). By pairwise comparison, there was no significant difference among the intragroup comparison in Haraguchi (1/2/3) and Mason (1/2A/2B/3) through Fisher’s exact test
^aChi-square test
^bt-test
^cMann–Whitney U test