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Table 3 Univariate analysis of overall mortality and disease-specific mortality

From: The association of infrared imaging findings of the breast with prognosis in breast cancer patients: an observational cohort study

   Overall mortality Disease-specific mortality
Variable n HR 95 % CI p HR 95 % CI p
Age ≤ 50 years 51 1   0.92 1   0.45
Age > 50 years 92 0.96 0.44–2.08 1.49 0.54–4.12
Postmenopausal 85 1.06 0.50–2.27 0.87 0.94 0.38–2.34 0.89
Clinical stage     <0 .0001    <0.0001
 stages I & II 101 1   1  
 Stage III 31 3.00 1.24–7.24 1.92 0.58–6.39
 Stage IV 11 10.89 4.35–27.23 14.02 5.05–38.94
Histology     0.14    0.92
 IDC 130 1   1  
 ILC 8 2.94 1.02–8.51 1.06 0.14–7.99
 Other subtypes 5 1.07 0.14–7.95 1.51 0.20–11.35
IDC tumor grade     0.80    0.86
 Grade 1 15 1   1  
 Grade 2 68 1.84 0.23–14.71 0.58 0.32–1.04
 Grade 3 39 2.10 0.25–17.96 0.40 0.21–0.79
Molecular subtype     0.39    0.36
 Luminal 78 1    1  
 HER2-enriched 32 1.73 0.71–4.24   0.87 0.23–3.22
 Triple-negative 33 1.65 0.67–4.03   1.90 0.71–5.11
IR signs a       
 IR1     0.03    0.04
 IR1 = 0 109 1   1  
 IR1 = 1 34 2.29 1.07–4.89 2.57 1.03–6.40
IR2     0.75    0.42
 IR2 = 0 61 1   1  
 IR2 = 1 82 0.89 0.42–1.87 0.69 0.28–1.70
IR 3     0.33    0.53
 IR3 = 0 12 1   1  
 IR3 = 1 131 2.71 0.37–19.95 1.91 0.26–14.34
IR 4     0.50    0.22
 IR4 = 0 114 1   1  
 IR4 = 1 29 1.34 0.57–3.16 1.83 0.70–4.81
IR 5     0.47    0.93
 IR5 = 0 26 1   1  
 IR5 = 1 117 1.48 0.51–4.27 0.95 0.32–2.87
  1. Estimated by univariate Cox proportional hazards analysis
  2. HR hazard ratio, 95 % CI 95 % confidence interval, IDC invasive ductal carcinoma, ILC invasive lobular carcinoma; IR: infrared
  3. aIR imaging signs are defined in Table 1; 0 = negative, 1 = positive