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Table 5 Unadjusted association between dental and radiographic-related factors and ORN

From: Predictors of osteoradionecrosis following irradiated tooth extraction

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