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Table 1 Baseline characteristics of study patients

From: Prognostic significance of the skeletal muscle index and systemic inflammatory index in patients with lymph node-positive breast cancer after radical mastectomy

Variable N (%) Low SMI High SMI P
Age, years [mean: 45.69]     0.970
  < 60 86 63 23  
  ≥ 60 11 8 3  
BMI    0.001
 Normal (18.5–23.9) 66 48 18  
 Overweight (24.0–27.9) 24 18 6  
 Obese (≥ 28.0) 7 5 2  
T stage    0.087
 1 24 15 9  
 2 53 39 14  
 3 10 8 2  
 4 10 9 1  
N stage    0.772
 1 30 22 8  
 2 37 28 9  
 3 30 21 9  
Clinical stage     0.987
 II 26 19 7  
 III 71 52 19  
ER    0.434
 Negative 36 28 8  
 Positive 61 43 18  
PR    0.715
 Negative 44 33 11  
 Positive 53 38 15  
Her2    0.423
 Negative 57 40 17  
 Positive 40 31 9  
Ki67    0.113
 Negative 22 19 3  
 Positive 75 52 23  
Subtype    0.764
 Luminal A 11 6 5  
 Luminal B 52 41 11  
 Her2 +  21 15 6  
 TNBC 13 9 4  
PNI    0.769
 Low 68 49 19  
 High 27 21 6  
 Missing 2 1 1  
SII    0.548
 Low 59 56 3  
 High 38 15 23  
  1. SMI skeletal muscle index, ER estrogen receptor, PR progesterone receptor, Her2 human epidermal growth factor receptor-2, TNBC triple negative breast cancer, PNI prognostic nutritional index, SII systemic inflammation index