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Table 1 Characteristics of patients with head and neck cancer and health controls

From: Effects of in IL-1B/IL-1RN variants on the susceptibility to head and neck cancer in a chinese Han population

Variables Cases Control P
N 535 538  
Age    
Mean ± SD, years 46.8 ± 15.1 46.9 ± 13.8 0.875
 > 46 years 296 (55.3%) 301 (55.9%)  
 ≤ 46 years 239 (44.7%) 237 (44.1%)  
Gender    0.908
 Male 205 (38.3%) 208 (38.7%)  
 Female 330 (61.7%) 330 (61.3%)  
Lymph nodes metastasis
 Yes 101 (18.9%)   
 No 82 (15.3%)   
 Unavailable 352 (65.8%)   
Stage
 I-II 140 (26.2%)   
 III-IV 34 (6.4%)   
 Unavailable 361 (67.5%)   
Type of head and neck cancer
 Nasopharyngeal carcinoma 75 (14.0%)   
 Thyroid cancer 398 (74.4%)   
 Laryngeal cancer 43 (8.0%)   
 Parotid gland carcinoma 19 (3.6%)   
  1. p values were calculated by χ2 test or the Student’s t test
  2. *p < 0.05 indicates statistical significance