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Table 2 Characteristics of the lesion and treatment results

From: Characteristics of patients with osteonecrosis of the jaw with oral versus intravenous bisphosphonate treatment

Variables Oral BP
Mean ± SD
IV BP
Mean ± SD
Difference
p value
Number of involved sites
 1 site 206 (82.1%) 15 (55.6%)  
 2 sites 37 (14.7%) 8 (29.6%)  
 3 sites 8 (3.2%) 3 (11.1%)  
 4 sites 206 (82.1%) 1 (3.7%)  
Average number of lesions 1.21 ± 0.48 1.63 ± 0.84 < .001
Location of the lesion .012
 Maxilla 74 (29.5%) 5 (18.5%)  
 Mandible 161 (64.1%) 16 (59.3%)  
 Both 16 (6.4%) 6 (22.2%)  
Number of the surgery
 0 7 (2.8%)  
 1 205 (81.7%) 15 (55.6%)  
 2 29 (11.5%) 7 (25.9%)  
 3 8 (3.2%) 2 (7.4%)  
 > 4 2 (0.8%) 3 (11.1%)  
Recurrent rate 39/251 (15.5%) 12/27 (44.4%) < .001*
Average number of the surgery 0.98 ± 0.73 1.65 ± .095 < .001
Outcome after initial surgery < .001*
 Good 205 (81.7%) 12 (44.4%)  
 Moderate 44 (17.5%) 13 (48.1%)  
 Poor 2 (0.8%) 2 (7.4%)  
  1. Inter-group differences were analyzed with independent t test; chi-squared test* was used for categorical variables