Application of medial column classification in treatment of intra-articular calcaneal fractures

Table 1 Comparison of Böhler angle, Gissane angle, calcaneus length, width, height, and articular surface step height in 91 patients before and after surgery and at the last follow-up (mean ± SD, n = 91)

Timing	Böhler angle (°)	Gissane angle (°)	Calcaneal length (mm)	Calcaneal width (mm)	Calcaneal height (mm)	Step thickness of articular surface (mm)
Preoperative	13.3 ± 2.3	93.8 ± 3.5	79.5 ± 5.5	55.0 ± 10.0	32.5 ± 6.0	6.0 ± 3.0
Postoperative	31.5 ± 3.5	126.5 ± 10.3	77.8 ± 5.5	39.5 ± 8.8	45.8 ± 4.1	0.4 ± 0.5
Test statistics	-38.123	-25.175	1.532	10.222	-15.134	17.257
P value	< 0.001	< 0.001	0.095	< 0.001	< 0.001	< 0.001