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Table 2 Differences between self-reported and objective measures in SPAN 2000-2002 and 2004-2005 pooled data

From: Measuring the bias, precision, accuracy, and validity of self-reported height and weight in assessing overweight and obesity status among adolescents using a surveillance system

  Difference in Height (cm) Difference in Weight (kg) Difference in BMI (kg/m2)
  Girls Boys Girls Boys Girls Boys
  Median (95%CI) p-value1 Median (95%CI) p-value1 Median (95%CI) p-value1 Median (95%CI) p-value1 Median (95%CI) p-value1 Median (95%CI) p-value1
8th Grade
African American 1.22 (0.69,1.75) <0.001 0.92 (-0.62,2.46) 0.238 -0.98 (-1.62,-0.33) 0.003 -0.29 (-1.28,0.69) 0.555 -0.70 (-0.94,-0.45) <0.001 -0.27 (-0.90,0.36) 0.394
Hispanic 0.78 (0.20,1.36) 0.008 0.80 (0.27,1.33) 0.003 -0.40 (-0.57,-0.24) <0.001 -0.68 (-1.03,-0.33) <0.001 -0.45 (-0.66,-0.25) <0.001 -0.49 (-0.72,-0.26) <0.001
White / Other2 0.29 (-0.08,0.66) 0.119 -0.23 (-0.81,0.35) 0.437 -0.76 (-0.96,-0.57) <0.001 -0.30 (-0.61,0.35) 0.053 -0.49 (-0.57,-0.41) <0.001 -0.23 (-0.41,-0.04) 0.015
11th Grade
African American 0.81 (0.13,1.50) 0.019 2.02 (1.42,2.61) <0.001 -0.82 (-1.32,-0.31) 0.001 -0.41 (-0.92,0.09) 0.104 -0.51 (-0.90,-0.11) 0.012 -0.58 (-0.80,-0.35) <0.001
Hispanic 1.04 (0.69,1.75) 0.001 1.87 (1.46,2.27) <0.001 0.004 (-0.42,0.43) 0.986 0.08 (-0.18,0.33) 0.548 -0.26 (-0.50,-0.02) 0.032 -0.52 (-0.67,-0.36) <0.001
White / Other2 0.68 (0.42,1.67) <0.001 1.87 (1.27,2.47) <0.001 -0.45 (-0.80,-0.10) 0.011 0.39 (-0.05,0.82) 0.08 -0.49 (-0.64,-0.34) <0.001 -0.39 (-0.59,-0.18) <0.001
  1. [1] p-value associated with the median difference between self-reported and objective measures.
  2. [2] White/other category includes non-Hispanic White, Asian, Pacific Islander, Native American, and “other”