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Table 1 Demographic information and pathological characteristics of study participants and distribution of characteristics

From: Association between manganese superoxide dismutase promoter gene polymorphism and breast cancer survival

  n (%)
Age at diagnosis  
   ≤50 years 133 (46)
   >50 years 158 (54)
Race  
   Caucasian 239 (82)
   African-American 52 (18)
Stage and node status  
   Stage 1 82 (28)
   Stage 2 negative 57 (20)
   Stage 2 positive 87 (30)
   Stage 3 48 (16)
   Stage 4 17 (6)
Estrogen receptor status  
   Positive 176 (64)
   Negative 101 (36)
Progesterone receptor status  
   Positive 128 (46)
   Negative 148 (54)
Treatment  
   Chemotherapy only 95 (33)
   Radiation only 25 (9)
   Chemotherapy/radiation 54 (19)
   radiation/tamoxifen 36 (12)
   Chemotherapy/tamoxifen 44 (16)
   Chemotherapy/radiation/tamoxifen 35 (12)
  1. Total n = 291.