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Table 1 Cross-Classification of Measured BMI and Self-Reported BMI for Standard BMI Categories*

From: Accuracy and usefulness of BMI measures based on self-reported weight and height: findings from the NHANES & NHIS 2001-2006

  Measured BMI:
Self Reported BMI: Under-weight
< 18.5
Normal Weight
18.5 < 25
Over-
weight
25 < 30
Obese
30 < 40
Extreme Obesity
40+
< 18.5 56.5% 1.5% 0.1% 0.0% 0.0%
18.5 < 25 43.5% 90.4% 16.0% 0.8% 0.0%
25 < 30 0.0% 8.0% 78.9% 19.0% 0.3%
30 < 40 0.0% 0.1% 5.1% 78.5% 27.8%
40+   0.0% 0.0% 1.6% 71.9%
N = 15161; Population Size: 193,275,651
  1. * Measured BMI was calculated using physical measurements of height and weight;
  2. Self-reported BMI was calculated using self-reported height and weight.
  3. Source: National Health and Nutrition Examination Survey, 2001-2006. National Center for Health Statistics, CDC
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