Table 4.
Lin’s concordance coefficients(95%CI), Pearson correlation coefficient and bias correction factor(BCF) between self-reported and objective measurements
| 8th-grade | Girls | Boys | ||||||
| LCC(95%CI) | p-value | Pearson | BCF | LCC(95%CI) | p-value | 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/Other | 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/Other | 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/Other | 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 | ||||||
| LCC(95%CI) | p-value | Pearson | BCF | LCC((95%CI) | p-value | 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/Other | 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/Other | 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/Other | 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 |
Lin’s concordance coefficient=LCC
White/other category includes non-Hispanic White, Asian, Pacific Islander, Native American, and “other”
p-values associated with testing the null hypothesis that the Lin’s concordance coefficient is equal to zero.