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Table 6 Under- and overestimation of BMI according to characteristics of children and their parents

From: Validity of parent-reported weight and height of preschool children measured at home or estimated without home measurement: a validation study

  Proportion with difference in BMI
< -1 kg/m², % (n/N)
P* Proportion with difference in BMI
> +1 kg/m², % (n/N)
P*
Parental report:       
Height estimated, weight estimated 50.0 (28/56)   19.6 (11/56)  
Height estimated, weight measured 31.4 (11/35)   17.1 (6/35)  
Height measured, weight estimated 46.2 (6/13)   7.7 (1/13)  
Height measured, weight measured 27.2 (44/162) 0.01 4.3 (7/162) 0.01
  1. * according to Fisher's exact test
  2. n = number of cases underestimating/overestimating BMI with > 1 kg/m2 (e.g. difference in BMI less than -1 kg/m2)
  3. N = total number of cases with the specified characteristic (e.g. number of boys; number of children < 5 years old; etc.)