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Table 4 Lin’s concordance coefficients1(95%CI), Pearson correlation coefficient and bias correction factor(BCF) between self-reported and objective measurements

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

8th-grade Girls Boys
  LCC1(95%CI) p-value3 Pearson BCF LCC1(95%CI) p-value3 Pearson BCF
Height
African American 0.70 (0.69,0.70) <0.001 0.76 0.92 0.86 (0.86,0.86) <0.001 0.90 0.96
Hispanic 0.60 (0.59,0.60) <0.001 0.66 0.91 0.64 (0.63,0.64) <0.001 0.69 0.92
White/Other2 0.82 (0.82,0.82) <0.001 0.84 0.98 0.85 (0.84,0.85) <0.001 0.86 0.98
All 0.73 (0.72,0.73) <0.001 0.76 0.96 0.77 (0.77,0.77) <0.001 0.80 0.96
Weight
African American 0.82 (0.81,0.82) <0.001 0.83 0.99 0.95 (0.95,0.95) <0.001 0.95 1.00
Hispanic 0.90 (0.89,0.90) <0.001 0.91 0.99 0.92 (0.92,0.92) <0.001 0.93 0.99
White/Other2 0.92 (0.92,0.92) <0.001 0.93 0.99 0.94 (0.93,0.94) <0.001 0.94 1.00
All 0.90 (0.89,0.90) <0.001 0.90 0.99 0.93 (0.93,0.93) <0.001 0.94 0.99
BMI
African American 0.78 (0.78,0.79) <0.001 0.80 0.98 0.90 (0.90,0.90) <0.001 0.91 0.99
Hispanic 0.81 (0.81,0.81) <0.001 0.82 0.99 0.83 (0.83,0.83) <0.001 0.84 0.99
White/Other2 0.86 (0.86,0.87) <0.001 0.88 0.98 0.86 (0.86,0.86) <0.001 0.86 1.00
All 0.83 (0.83,0.83) <0.001 0.84 0.99 0.85 (0.85,0.85) <0.001 0.86 1.00
11th Grade Girls Boys
  LCC1(95%CI) p-value3 Pearson BCF LCC1((95%CI) p-value3 Pearson BCF
Height
African American 0.82 (0.82,0.82) <0.001 0.85 0.97 0.90 (0.90,0.91) <0.001 0.95 0.95
Hispanic 0.61 (0.61,0.62) <0.001 0.66 0.92 0.71 (0.71,0.71) <0.001 0.76 0.94
White/Other2 0.89 (0.89,0.89) <0.001 0.90 0.98 0.89 (0.89,0.89) <0.001 0.92 0.96
All 0.80 (0.80,0.81) <0.001 0.83 0.97 0.84 (0.84,0.84) <0.001 0.87 0.96
Weight
African American 0.92 (0.91,0.92) <0.001 0.92 1.00 0.96 (0.96,0.96) <0.001 0.97 0.99
Hispanic 0.96 (0.96,0.96) <0.001 0.96 1.00 0.95 (0.95,0.95) <0.001 0.95 1.00
White/Other2 0.96 (0.96,0.96) <0.001 0.96 1.00 0.94 (0.94,0.94) <0.001 0.94 1.00
All 0.95 (0.95,0.95) <0.001 0.95 1.00 0.95 (0.95,0.95) <0.001 0.95 1.00
BMI
African American 0.86 (0.86,0.86) <0.001 0.87 0.99 0.93 (0.93,0.93) <0.001 0.95 0.98
Hispanic 0.88 (0.88,0.88) <0.001 0.88 0.99 0.84 (0.84,0.85) <0.001 0.85 1.00
White/Other2 0.92 (0.92,0.92) <0.001 0.93 0.99 0.91 (0.91,0.91) <0.001 0.92 0.99
All 0.89 (0.89,0.89) <0.001 0.90 0.99 0.89 (0.89,0.89) <0.001 0.90 0.99
  1. [1] Lin’s concordance coefficient=LCC
  2. [2] White/other category includes non-Hispanic White, Asian, Pacific Islander, Native American, and “other”
  3. [3] p-values associated with testing the null hypothesis that the Lin’s concordance coefficient is equal to zero.