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Table 1 Baseline characteristics of patients

From: Prognostic value of simultaneous 18F-FDG PET/MRI using a combination of metabolo-volumetric parameters and apparent diffusion coefficient in treated head and neck cancer

Characteristics Values
Number of patients 72
Gender M:F = 45: 27
Age (year) 55.9 ± 14.6 (range = 20–86)
Tumor site R:L = 32: 40
Tumor location
 Oral cavity and tongue 37 (51.4%)
 Pharynx 12 (16.7%)
 Larynx 6 (8.3%)
 Nasal cavity and paranasal sinuses 8 (11.1%)
 Salivary glands 9 (12.5%)
HPV status
 Positive 10 (13.9%)
 Negative 21 (29.2%)
 N/A 41 (57.7%)
Follow-up after surgery (months) 32.8 ± 10.8 (range = 12–55)
Recurrence 22 (30.6%)
Recurrence after surgery (months) 13.0 ± 7.0 (range = 5–33)
Type of treatment failure
 Loco-regional recurrence 10 (13.9%)
 Distant metastasis 12 (16.7%)
T stage
 T1/T2 24 (33.3%)/23 (31.9%)
 T3/T4a 20 (27.8%)/5 (7.0%)
N stage
 N0 42 (58.3%)
 N1/N2 12 (16.7%)/18 (25.0%)
TNM stage
 I/II 17 (23.6%)/14 (19.4%)
 III/IVA 19 (26.4%)/22 (30.6%)
Adjuvant therapy
 No 33 (45.8%)
 RT/CCRT 24 (33.3%)/15 (20.9%)
  1. HPV human papillomavirus, RT radiation therapy, CCRT concurrent chemoradiation therapy, N/A not assessed