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Table 2 Diagnostic performance of MRI on axillary lymph node evaluation between BMI groups

From: The impact of body mass index (BMI) on MRI diagnostic performance and surgical management for axillary lymph node in breast cancer

  Total
N = 2084
BMI
< 18.5
N = 71
BMI
18.5 ~ < 24
N = 1045
BMI
24~ 35
N = 968
p value
ALN metastasis on MRI      < 0.01
 Yes 893 (42.9) 13 (18.3) 394 (37.7) 486 (50.2)  
 No 1191 (57.1) 58 (81.7) 651 (62.3) 482 (49.8)  
ALN metastasis on pathology      0.09
 Yes 738 (35.4) 22 (31.0) 350 (33.5) 366 (37.8)  
 No 1346 (64.6) 49 (69.0) 695 (66.5) 602 (62.2)  
MRI diagnostic performance
 Sensitivity (%) 63.7 40.9 58.3 70.2 < 0.01
 Specificity (%) 68.6 91.8 72.7 62.0 < 0.01
 PPV (%) 52.6 69.2 51.8 52.9 0.46
 NPV (%) 77.5 77.6 77.6 77.4 1.00
 Accuracy (%) 66.8 76.1 67.8 65.1 0.10
  1. Statistically significant difference
  2. PPV positive predictive value, NPV negative predictive value