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Table 3 Association between clinical factors and constant, k

From: Seroma change during magnetic resonance imaging-guided partial breast irradiation and its clinical implications

Variable n k ap
Age
  < 57 years 16 0.048 ± 0.022 0.55
  ≥ 57 years 17 0.044 ± 0.024  
Body mass index
  < 25 kg/m2 14 0.057 ± 0.023 0.02
  ≥ 25 kg/m2 19 0.038 ± 0.020  
Location (upper vs. lower)
 Upper 26 0.049 ± 0.022 0.11
 Lower 7 0.034 ± 0.024  
Location (outer vs. inner)
 Outer 18 0.049 ± 0.023 0.43
 Inner 15 0.042 ± 0.023  
Surgery-10th fraction interval
  < 43 days 16 0.053 ± 0.025 0.09
  ≥ 43 days 17 0.039 ± 0.019  
  1. aStudent’s t-test