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Table 3 Proportion of participants who accurately, under- and over-reported their height and weight stratified by sex, age group, and obesity classification

From: Measuring the accuracy of self-reported height and weight in a community-based sample of young people

    Accurate1 Under-report2 Over-report3 p-value4
    n % n % n %  
Height   Overall 35 52 20 30 12 18  
Sex Males 17 50 8 24 9 26 0.16
Females 18 55 12 36 3 9
Age group (years) 16-19 16 48 10 30 7 21 0.72
20-29 19 56 10 29 5 15
Obesity classification Non-overweight5 22 54 11 27 8 20 0.79
  Overweight/obese6 13 50 9 35 4 15
Weight   Overall 23 34 35 52 9 13  
Sex Males 15 44 12 35 7 21 0.01
Females 8 24 23 70 2 6
Age group (years) 16-19 13 39 16 48 4 12 0.74
20-29 10 29 19 56 5 15
Obesity classification Non-overweight5 17 41 18 44 6 15 0.24
Overweight/obese6 6 23 17 65 3 12
  1. 1 Accurate defined as self-report less than two units (kg or cm) different from measured value.
  2. 2 Under-report defined as self-reported height or weight two or more units (kg or cm) less than measured value.
  3. 3 Over-report defined as self-reported height or weight two or more units (kg or cm) more than measured value.
  4. 4 Fisher’s exact test. Significant p-values shown in bold.
  5. 5 BMI<25 kg/m2 or less than age-specific cut-offs if under 18 years.
  6. 6 BMI ≥25 kg/m2 or more than age-specific cut-offs if under 18 years.
  7. Significant p-values (p<0.05) shown in boldface.