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Table 6 Correction equations to estimate objectively-measured weight (Kg) using self-reported 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

 

Girls

Boys

 

n (N)4

Correction Equation

R2

n (N)4

Correction Equation

R2

Grade=8 1

African American

832 (35290)

11.30+0.85 SRWeight

68.1%

720 (38025)

3.44+0.96 SRWeight

90.9%

Hispanic

3058 (104284)

-0.04+1.02 SRWeight

82.0%

2817 (124777)

0.46+1.02 SRWeight

86.1%

White/Other 2

2992 (125746)

1.35+1.00 SRWeight

86.5%

3269 (136071)

1.41+0.99 SRWeight

88.2%

Grade=11 3

African American

608 (28565)

6.24+0.93 SRWeight

84.7%

506 (26932)

-5.21+1.08 SRWeight

93.1%

Hispanic

1847 (71924)

-1.28+1.03 SRWeight

91.9%

1714 (78732)

1.18+0.99 SRWeight

90.0%

White/Other 2

2520 (122353)

-0.34+1.02 SRWeight

92.9%

2652 (146334)

2.07+0.97 SRWeight

88.4%

  1. [1] Grade 8 students had a mean age of 13.7 years old (SE=0.02) and their percentiles 25% and 75% are 12.7 and 13.7 years old, respectively
  2. [2] White/other category includes non-Hispanic White, Asian, Pacific Islander, Native American, and “other”
  3. [3] Grade 11 students had a mean age of 16.7 years old (SE=0.03) and their percentiles 25% and 75% are 15.7 and 16.7 years old, respectively
  4. [4] n = sample size; N = estimated population size using the sampling weights, R2 = coefficient of determination in percentage; SR = self-reported
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International Journal of Behavioral Nutrition and Physical Activity

ISSN: 1479-5868

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