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Table 3 Cox regression* results of PFS and OS 2

From: The maximum standardized uptake value of 18 F-FDG PET scan to determine prognosis of hormone-receptor positive metastatic breast cancer

Cox regression results of PFS
Independent prognostic factors Hazard ratio (HR) 95% CI P value
Relapse-free interval    
 ≤ 2 years Ref   
 > 2 years 0.51 0.34-0.76 0.001
No. of metastatic sites    
 1 Ref   
 2 1.00 0.59-1.68 0.993
 ≥ 3 1.90 1.18-3.08 0.008
Baseline SUVmax    
 Lowest tertile Ref   
 Intermediate tertile 1.60 0.97-2.66 0.067
 Highest tertile 2.06 1.23-3.45 0.006
Cox regression results of OS 2
 Independent prognostic factors Hazard ratio (HR) 95% CI P value
Relapse-free interval    
 ≤ 2 years Ref   
 > 2 years 0.44 0.25-0.78 0.005
Baseline SUVmax    
 Lowest tertile Ref   
 Intermediate tertile 2.44 1.12-5.32 0.025
 Highest tertile 3.54 1.66-7.55 0.001
  1. * The procedure was carried out with the method of “Forward: LR”.
  2. PFS: progression-free survival; OS: overall survival; CI: confidence interval; No.: number; SUVmax: the maximum standardized uptake value; Ref: reference category.