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Table 2 Univariate prognostic analysis for overall survival (OS) rates of 1260 patients with laryngeal cancer

From: ABO blood group is a predictor of survival in patients with laryngeal cancer

Variable No. of patients OS rate (%) χ 2 P
5-year 10-year
Sex     6.079 0.014
 Men 1226 70.0 59.7   
 Women 34 85.3 85.3   
Age (years)a     35.892 <0.001
 ≤61 661 76.0 68.7   
 >61 599 64.4 51.5   
Smoking indexb     8.322 0.004
 ≤600 659 73.2 64.1   
 >600 601 67.4 56.2   
Alcohol consumption     4.933 0.026
 No 808 72.3 62.5   
 Yes 452 67.2 56.6   
Differentiation     27.775 <0.001
 Well 600 76.8 65.7   
 Moderate 481 68.5 58.4   
 Poor 179 54.6 48.1   
Primary site     31.102 <0.001
 Glottic 885 74.8 64.8   
 Supraglottic 331 58.6 48.7   
 Subglottic 44 72.7 56.2   
Blood group     11.637 0.009
 A 347 76.0 67.5   
 B 332 69.8 58.4   
 AB 101 73.1 65.6   
 O 480 66.4 55.5   
T category     101.754 <0.001
 T1 434 84.2 72.0   
 T2 382 74.3 63.0   
 T3 244 59.4 51.4   
 T4 200 46.8 41.1   
N category     119.722 <0.001
 N0 1021 76.9 66.1   
 N+ 239 43.0 35.4   
UICC stage     127.473 <0.001
 I 421 85.4 73.5   
 II 326 77.2 65.3   
 III 242 62.4 52.6   
 IV 271 46.3 41.4   
  1. UICC Union for International Cancer Control
  2. aPatients were divided into two groups according to the median age
  3. bSmoking index was defined as the number of cigarettes smoked per day × the total smoking duration (years)