Table 2.

Variables significantly associated with relapse according to the Cox regression analysis

	HR (95% CI)	P
Symptoms longer than 3 months	4.98 (1.42–17.54)	0.012
Bone exposure	12.66 (3.15–49.26)	0.0003
Type of surgical treatment		< 0.0001
None vs Debridement	3.41 (1.12–10.42)	0.031
None vs Debridement and flap	33.27 (7.80–141.88)	< 0.0001
Debridement vs Debridement and flap	9.75 (2.10–45.21)	0.004