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Table 3 Univariate and multivariate analyses of risk factors for locoregional recurrence

From: Sole adjuvant intraoperative breast radiotherapy in Taiwan: a single-center experience

  Crude HR (95% CI) p value Adjusted HR (95% CI) p value
Radiotherapy type
 EBRT Reference   Reference  
 IORT 5.67 (1.29–24.93) 0.022 52.23 (3.37–809.99) 0.005
BMI
 < 24 Reference   Reference  
 ≥ 24 1.64 (0.39–6.85) 0.501 1.70 (0.28–10.20) 0.563
Age
 < 50 Reference   Reference  
 50–59 0.48 (0.09–2.46) 0.375 0.13 (0.01–1.48) 0.101
 ≥ 60 0.38 (0.04–3.23) 0.374 0.15 (0.01–1.89) 0.142
Tumor size (mm) 1.00 (0.93–1.08)   1.01 (0.93–1.10) 0.810
Section margin
 Negative Reference   Reference  
 Positive 12.61 (2.44–65.08) 0.002 53.91 (3.02–962.98) 0.007
pN-stage
 N0 Reference   Reference  
 N1 + 2 0.93 (0.11–7.71) 0.945 0.38 (0.05–2.73) 0.335
 N3 11.32 (1.34–95.33) 0.026 0.28 (0.02–4.84) 0.382
ER/PR status
 Negative Reference   Reference  
 Positive 0.67 (0.14–3.34) 0.629 0.67 (0.08–5.50) 0.713
Her-2 status     
 Negative reference   reference  
 Positive 2.96 (0.71–12.40) 0.137 6.06 (0.61–60.46) 0.125
Lymphovascular invasion
 Negative Reference   Reference  
 Positive 1.48 (0.33–6.60) 0.610 5.37 (0.88–32.87) 0.069