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Table 2 Multivariate analysis for recurrence-free survival using Cox proportional hazards regression model

From: Standardized uptake value of 18F-fluorodeoxyglucose positron emission tomography for prediction of tumor recurrence in breast cancer beyond tumor burden

Factors Hazard ratio 95% CI P -value
Age    0.144
  >35 yr Reference   
  ≤35 yr 1.86 0.81 to 4.25  
Tumor size    0.151
  ≤2 cm Reference   
  >2 cm 1.63 0.84 to 3.19  
Nodal status    0.038
  Negative Reference   
  Positive 1.93 1.04 to 3.59  
Estrogen receptor status    0.021
  Positive Reference   
  Negative 2.19 1.12 to 4.27  
HER2 status    0.389
  Negative Reference   
  Positive 1.33 0.69 to 2.57  
SUV max b    0.013
  Low (<4) Reference   
  High (≥4) 2.39 1.20 to 4.76  
  1. aCI, Confidence interval; HER2, Human epidermal growth factor receptor-2; SUVmax, Maximum standardized uptake value. bP = 0.009 and χ2 = 25.41 for the comparison with the analysis without SUVmax (by the likelihood ratio test).