Validity of self-reported height and weight among adolescents: the importance of reporting capability

Rasmussen, Mette; Holstein, Bjørn E; Melkevik, Ole; Damsgaard, Mogens Trab

doi:10.1186/1471-2288-13-85

BMC Medical Research Methodology

Table 5 Multivariate analyses of variance of associations between response capability and difference between self-reported and directly measured weight, height and BMI

From: Validity of self-reported height and weight among adolescents: the importance of reporting capability

	Model 1*				Model 2**
	Difference in self-reported and directly measured weight				Difference in self-reported and directly measured weight
	Boys		Girls		Boys		Girls
	B (kg)	P value	B (kg)	P value	B (kg)	P value	B (kg)	P value
Weighing history
Weighed recently	Ref.		Ref.		Ref.		Ref.
Not weighed recently	0.4178	0.3306	−1.1977	<0.0001	0.5586	0.1569	−1.0197	<0.0001
Recall ability for weight
High	Ref.		Ref.		Ref.		Ref.
Low	−0.5377	0.3580	−1.3932	<0.0001	−0.2290	0.6707	−0.9902	0.0024
Response capability for weight
Weighed recently + high recall ability	Ref.		Ref.		Ref.		Ref.
Weighed recently + low recall ability	−0.1214	0.9055	−2.1313	0.0001	0.5085	0.5890	−1.6961	0.0008
Not weighed recently + high recall ability	0.7962	0.1108	−1.3159	0.0002	0.9603	0.0364	−1.2345	<0.0001
Not weighed recently + low recall ability	−0.4524	0.5145	−1.2579	0.0028	−0.2233	0.7261	−0.8671	0.0240
	Difference in self-reported and directly measured height				Difference in self-reported and directly measured height
	Boys		Girls
	B (cm)	P value	B (cm)	P value	B (cm)	P value	B (cm)	P value
Height measuring history
Measured recently	Ref.		Ref.		Ref.		Ref.
Not measured recently	−0.1000	0.7886	−0.0002	0.9994	−0.1867	0.5996	0.0040	0.9873
Recall ability for height
High	Ref.		Ref.		Ref.		Ref.
Low	−0.4949	0.1786	−0.1885	0.5077	−0.5693	0.1207	−0.2105	0.4483
Response capability for height
Measured recently + high recall ability	Ref.		Ref.		Ref.		Ref.
Measured recently + low recall ability	−0.6893	0.1552	0.0092	0.9824	−0.7789	0.1068	0.0282	0.9459
Not measured recently + high recall ability	−0.0610	0.8925	0.1533	0.6119	−0.1728	0.7010	0.1945	0.5183
Not measured recently + low recall ability	−0.3046	0.5553	−0.2948	0.4287	−0.4020	0.4343	−0.3449	0.3530
	Difference in BMI z-score based of self-reported and direct measures of weight and height				Difference in BMI z-score based of self-reported and direct measures of weight and height
	Boys		Girls		Boys		Girls
	B	P value	B	P value	B	P value	B	P value
BMI response capability***
High	Ref.		Ref.		Ref.		Ref.
Low	0.0404	0.4576	−0.1252	0.0019	0.0576	0.2684	−0.1042	0.0077

* adjusted for age, family occupational social class, family structure and migration. A random effect of school was included to adjust for the design effect introduced by the applied cluster sampling approach.
** adjusted for age, family occupational social class, family structure, migration and direct measure of height and/or weight. A random effect of school was included to adjust for the design effect introduced by the applied cluster sampling approach.
***High BMI response capability = measured recently + high recall ability for height + weighed recently + high recall ability for weight, Low combined response capability = remaining categories.

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ISSN: 1471-2288

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