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Table 2 Cross-classification of BMID and BMIC for standard BMI categories

From: Examining validity of body mass index calculated using height and weight data from the US driver license

  BMI C (%)
  Underweight Normal weight Overweight Class I obesity Class II/III obesity
Female
BMI D category
 Underweight 106 (45.9) 117 (50.6) 7 (3.0) 1 (0.4) 0 (0.0)
 Normal weight 76 (2.0) 2491 (66.6) 959 (25.6) 185 (4.9) 30 (0.8)
 Overweight 7 (0.3) 127 (5.3) 1239 (51.9) 785 (32.9) 229 (9.6)
 Class I obesity 2 (0.1) 6 (0.4) 94 (6.6) 692 (48.5) 634 (44.4)
 Class II/III obesity 0 (0.0) 1 (0.1) 7 (0.6) 55 (4.9) 1055 (94.4)
 Sensitivity 0.555 0.909 0.537 0.403 0.542
 Specificity 0.986 0.797 0.826 0.898 0.991
 Pos. predictive value 0.459 0.666 0.519 0.485 0.944
 Neg. predictive value 0.990 0.951 0.836 0.863 0.885
Male
BMI D category
 Underweight 25 (49.0) 22 (43.1) 4 (7.8) 0 (0.0) 0 (0.0)
 Normal weight 22 (1.1) 1486 (73.0) 484 (23.8) 41 (0.2) 2 (0.1)
 Overweight 1 (0.0) 219 (7.2) 2130 (70.3) 637 (21.0) 45 (1.5)
 Class I obesity 0 (0.0) 11 (0.7) 133 (8.2) 1064 (65.4) 420 (25.8)
 Class II/III obesity 0 (0.0) 0 (0.0) 11 (1.2) 72 (7.8) 842 (91.0)
 Sensitivity 0.521 0.855 0.771 0.587 0.643
 Specificity 0.997 0.908 0.816 0.904 0.987
 Pos. predictive value 0.490 0.730 0.703 0.654 0.910
 Neg. predictive value 0.997 0.955 0.864 0.876 0.931
  1. Note. Subscript C is used to denote BMI calculated using the clinical height and weight values. Subscript D is used to denote BMI calculated using the height and weight values obtained from the DLD