Table 5.

Unadjusted association between dental and radiographic-related factors and ORN

Dental and radiographic factors	OR (95%CI)	p value
Timing of extraction post RT
≤ 5 years	1.00
> 5 years	0.06 (0.01–0.25)	< 0.001
Extraction procedure
Simple extraction	1.00
Surgical removal	6.50 (1.37–30.91)	0.02
Mandibular canal UCL visibility
Line visible	1.00
Line not visible	9.47 (1.61–55.88)	0.01

Hosmer–Lemeshow test (X²(8) = 5.36, p = 0.72); Classification table: % correctly classified = 95.3%, sensitivity = 65.6%, specificity = 98.0%