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Table 2 Comparison of measured and self-reported values for height, weight, and BMI overall and 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

   

Measured

Self-reported

Pearson correlation between measured and self-reported

Test of equality between measured and self-reported, p-value

   

Mean (SD)

Median

Mean (SD)

Median

Total

(n=67 )

Height (cm)

173.7 (9.8)

175.0

172.7 (11.9)

174.0

0.94

0.06

Weight (kg)

72.0 (14.7)

70.2

70.1 (14.5)

68.0

0.96*

<0.01*

BMI (kg/m2)

23.7 (3.2)

23.2

23.4 (3.2)

23.0

0.84

0.16

Sex

Males (n=34)

Height (cm)

180.2 (7.5)

180.0

180.5 (8.5)

180.0

0.94

0.66

Weight (kg)

80.2 (14.0)

78.8

79.2 (13.2)

80.0

0.92*

0.28*

BMI (kg/m2)

24.6 (3.3)

24.5

24.2 (2.8)

23.3

0.85

0.21

Females (n=33)

Height (cm)

166.9 (6.9)

165.0

164.6 (9.3)

164.0

0.84

0.01

Weight (kg)

63.6 (9.9)

63.1

60.8 (8.8)

60.0

0.93

<0.01

BMI (kg/m2)

22.8 (2.9)

22.0

22.5 (3.4)

21.1

0.82

0.44

Age group (years)

16-19 (n=33 )

Height (cm)

173.6 (11.0)

172.0

172.4 (13.6)

172.0

0.92

0.22

Weight (kg)

70.2 (14.7)

68.0

68.1 (14.6)

65.0

0.94*

0.01*

BMI (kg/m2)

23.1 (2.9)

22.0

22.8 (3.1)

22.6

0.76

0.39

20-29 (n=34 )

Height (cm)

173.8 (8.7)

175.8

172.9 (10.2)

175.5

0.96

0.10

Weight (kg)

73.8 (14.6)

73.3

72.1 (14.4)

70.5

0.96

0.01

BMI (kg/m2)

24.3 (3.4)

24.7

23.9 (3.3)

24.3

0.89

0.23

Obesity classification

Non-overweight1 (n=43)

Height (cm)

172.4 (9.2)

172.0

171.3 (10.9)

172.0

0.92

0.22

Weight (kg)

65.1 (9.6)

66.0

64.0 (10.4)

64.0

0.96

0.05

BMI (kg/m2)

21.8 (1.8)

21.9

21.7 (2.4)

21.6

0.81*

0.16*

Overweight/obese2 (n=24)

Height (cm)

176.1 (10.6)

177.5

175.1 (13.4)

179.5

0.96

0.15

Weight (kg)

84.5 (13.9)

83.5

81.1 (14.6)

80.0

0.93

<0.01

BMI (kg/m2)

27.1 (2.1)

26.2

26.3 (2.3)

25.9

0.40*

0.14*

  1. * Non-parametric equivalent test used (spearman correlation and Wilcoxon signed ranks test).
  2. 1 BMI<25 kg/m2, or BMI less than age-specific cut-offs if under 18 years.
  3. 2 BMI ≥25 kg/m2, or BMI greater than age-specific cut-offs if under 18 years.
  4. Significant p-values (p<0.05) shown in boldface.
  5. SD - standard deviation