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Table 1 Demographic, health and habit factors, tumour, radiation, surgery involving the jaws, oral hygiene in patients who had dental extraction post radiotherapy to the head and neck (N = 73)

From: Predictors of osteoradionecrosis following irradiated tooth extraction

Variable Category n (%)
Age 47 (38.5–55.0)  
Gender Male 41 (56.2%)
  Female 32 (43.8%)
Medical illness Hypertension 23 (31.5%)
  Endocrine-related (DM, Thy) 14 (19.3%)
  No other medical illness 31 (42.4%)
  Others 4 (5.5%)
  No data 1 (1.4%)
Smoking status Smoker 4 (5.5%)
  Non-smoker 59 (80.8%)
  No data 10 (13.7%)
Alcohol intake status Drinker 3 (4.1%)
  Non-drinker 53 (72.6%)
  No data 17 (23.3%)
Tumour site Oral 14 (19.2%)
  Oropharynx 6 (8.2%)
  Nasopharynx 40 (54.8%)
  Larynx 5 (6.8%)
  Other sites 8 (11.0%)
Clinical stage (AJCC) I 5 (6.8%)
  II 13 (17.8%)
  III 18 (24.7%)
  IV 18 (24.7%)
  No data 19 (26.0%)
Radiation plan RT only 27 (37.0%)
  Concurrent chemoradiotherapy 35 (47.9%)
  No data 11 (15.1%)
Type of radiotherapy 2D RT 35 (47.2%)
  3D CRT 10 (13.9%)
  IMRT 3 (4.2%)
  No data 25 (34.7%)
Pre-radiotherapy surgical intervention Mandibular surgery 10 (13.7%)
  Maxillectomy 4 (5.5%)
  Without surgical intervention 55 (75.3%)
  No data 4 (5.5%)
Oral hygiene status Good 6 (8.2%)
  Moderate 14 (19.2%)
  Poor 44 (60.3%)
  No data 9 (12.3%)
No of teeth removed in a patient ≤ 3 40 (54.8)
  > 3 33 (45.2)
Other late toxicity of RT   
 Xerostomia Yes 46 (63.0%)
  No 10 (13.7%)
  No data 17 (23.3%)
 Trismus Yes 15 (20.5%)
  No 51 (69.9%)
  No data 7 (9.6%)
  1. DM diabetes mellitus, Thyr hyper/hypothyroidism, 2D RT two-dimensional radiotherapy planning, 3D CRT three dimensional conformal RT, IMRT intensity modulated radiation therapy