Agreement of adolescents’ self-perception of their body image with the analysis on the three-dimensional body image

Confortin, Susana Cararo; Souza, Camila Meireles; Oliveira, Bianca Rodrigues de; Marques, Karla Daniele Silva; Rudakoff, Lívia Carolina Sobrinho; Magalhães, Elma Izze da Silva; Silva, Antônio Augusto Moura da

doi:10.1590/1806-93042022000100009

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Revista Brasileira de Saúde Materno Infantil

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ORIGINAL ARTICLES • Rev. Bras. Saúde Mater. Infant. 22 (01) • Jan-Mar 2022 • https://doi.org/10.1590/1806-93042022000100009 copy

Agreement of adolescents’ self-perception of their body image with the analysis on the three-dimensional body image

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

Objectives:

to verify the agreement among adolescents’ perception of their own body image and the health professionals’ analysis based on three-dimensional body image and the inter-rater agreement.

Methods:

a cross-sectional study was carried out with 1,662 adolescents, aged 18 to 19 years old, from the 1997/98 birth cohort in São Luís, Maranhão. Self-perception of body image was assessed using the Stunkard’s body image scale. Three nutritionists evaluated the three-dimensional body image obtained by the Photonic Scanner (3D Body Scanner) and classified according to the Stunkard’s scale. The agreement between raters was verified by using weighted Kappa.

Results:

the analysis of agreement between raters in the general group and when stratified by sexwas considered moderate to good by Kappa. Regarding the intraclass correlation (ICC), good and excellent correlation values were observed both in the general group, males and females. There was a greater perception of overweight by all raters, when compared with the adolescents’ self-assessments. When stratified by sex, examiner 1 had the same perception as male self-assessments, as for females the perception of overweight was more frequent, as well as raters 2 and 3, for both sexes.

Conclusion:

agreement between raters and self-assessments was considered weak/moderate in Kappa and good/excellent in ICC.

Key words
Adolescent; Body image; Body dissatisfaction

Variable	Three-dimensional body image
	No		Yes		p^ * Pearson’s Chi-Square Test.*
	n	%	n	%	p^ * Pearson’s Chi-Square Test.*
Age (years) (N=2,515)					<0.001
18	290	34.00	1,452	87.36
19	563	66.00	210	12.64
Sex (N=2,515)					0.046
Male	382	44.78	814	48.98
Female	471	55.22	848	51.02
Schooling (years) (N=2,500)					<0.001
0 - 11	270	32.18	882	53.10
≥12	569	67.82	779	46.90
Skin Color (N=2,502)					0.007
White	198	23.35	299	18.08
Black	140	16.51	276	16.69
Mixed race	510	60.14	1,079	65.24
Economy class (N=2,226)					<0.001
A-B	262	34.43	398	27.17
C	379	49.80	737	50.31
D-E	120	15.77	330	22.53
Marital status (N=2,515)					0.320
No partner	817	95.78	1,605	96.57
Consensual union	36	4.22	57	3.43
Total physical activity (N=2,384)					0.926
Insufficiently active	334	41.49	652	41.29
Physically active	471	58.51	927	58.71
Alcohol consumption (N=2,488)					0.202
No	370	44.00	769	46.69
Yes	471	56.00	878	53.31
Smoking (N=2,515)					0.185
No	817	95.78	1,609	96.81
Yes	36	4.22	53	3.19

Agreement	Agreement	Expected Agreement	Kappa weighted	p	ICC^* * Average intraclass correlation coefficient (ICC) measures.	p
General
Raters 1 and 2	91.97%	80.51%	0.588	<0.001	0.890	<0.001
Raters 1 and 3	94.41%	81.72%	0.694	<0.001	0.926	<0.001
Raters 2 and 3	91.58%	81.15%	0.554	<0.001	0.875	<0.001
Rater 1 and self-assessments	85.53%	78.43%	0.329	<0.001	0.721	<0.001
Rater 2 and self-assessments	89.11%	80.87%	0.431	<0.001	0.785	<0.001
Rater 3 and self-assessments	85.10%	78.92%	0.293	<0.001	0.693	<0.001
Male
Raters 1 and 2	89.99%	81.01%	0.473	<0.001	0.844	<0.001
Raters 1 and 3	94.63%	83.21%	0.680	<0.001	0.920	<0.001
Raters 2 and 3	90.85%	82.10%	0.489	<0.001	0.848	<0.001
Rater 1 and self-assessments	86.79%	80.04%	0.338	<0.001	0.718	<0.001
Rater 2 and self-assessments	90.61%	82.13%	0.474	<0.001	0.806	<0.001
Rater 3 and self-assessments	88.07%	81.00%	0.372	<0.001	0.748	<0.001
Female
Raters 1 and 2	93.87%	80.51%	0.685	<0.001	0.924	<0.001
Raters 1 and 3	94,21%	80.82%	0.698	<0.001	0.928	<0.001
Raters 2 and 3	92.29%	81.45%	0.584	<0.001	0.884	<0.001
Rater 1 and self-assessments	84.32%	76.84%	0.323	<0.001	0.724	<0.001
Rater 2 and self-assessments	87.68%	79.54%	0.398	<0.001	0.772	<0.001
Rater 3 and self-assessments	82.24%	76.85%	0.233	<0.001	0.657	<0.001

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[1] Author’s contribution

Confortin SC, Souza CM, Oliveira BR, Marques KDS, Rudakoff LCS, EIS Magalhães, AAM Silva collaborated in the design, analysis and interpretation of data and the elaboration of the manuscript. All authors substantially contributed to the critical review and approved the final version of the article. The authors declare no conflict of interest.