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Table 3 Univariate analysis of patient characteristics

From: Prognostic analysis of radiation pneumonitis: carbon-ion radiotherapy in patients with locally advanced lung cancer

Parameters No of patients with ≥ G2 RP (%) No of patients with G0-1 RP (%) p value
Age    0.074
 < 75 years old 1 (11) 25 (45)  
 ≥ 75 8 (89) 31 (55)  
Sex    0.392
 Man 6 (67) 45 (80)  
 Female 3 (33) 11 (20)  
PS    0.458
 0 or 1 8 (89) 53 (95)  
 2 1 (11) 3 (5)  
Location of primary tumor    0.706
 Upper or Middle lobe 7 (78) 36 (64)  
 Lower lobe 2 (22) 20 (36)  
Clinical Stage    1.000
 II 5 (56) 32 (57)  
 III 4 (44) 24 (43)  
Total dose    1.000
 ≤ 72 Gy RBE 8 (89) 46 (82)  
 > 72 Gy RBE 1 (11) 10 (18)  
Chemotherapy    0.187
 Yes 0 14 (25)  
 No 9 (100) 42 (75)  
Brinkman Index    1.000
 < 600 3 (33) 19 (34)  
 ≥ 600 6 (67) 37 (66)  
Pulmonary emphysema    0.191
 Yes 0 12 (21)  
 No 9 (100) 44 (79)  
  1. G grade, RP radiation pneumonitis, PS performance status, RBE relative biological effectiveness