Psychometric behaviour of the strengths and difficulties questionnaire (SDQ) in the Spanish national health survey 2006
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Other documents of the author: Gómez Beneyto, Manuel; Nolasco Bonmatí, Andreu; Moncho Vasallo, Joaquín; Pereyra Zamora, Pamela; Tamayo Fonseca, Nayara; Munarriz Ferrandis, Mikel; Salazar Fraile, José; Tabarés Seisdedos, Rafael; Girón, Manuel
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Title
Psychometric behaviour of the strengths and difficulties questionnaire (SDQ) in the Spanish national health survey 2006Author (s)
Date
2013-03-22Publisher
BioMed CentralISSN
1471-244X; 1471-244XBibliographic citation
GÓMEZ-BENEYTO, Manuel, et al. Psychometric behaviour of the strengths and difficulties questionnaire (SDQ) in the Spanish national health survey 2006. BMC psychiatry, 2013, vol. 13, no 1, p. 95Type
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http://www.biomedcentral.com/1471-244X/13/95Version
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Abstract
Background: The Strengths and Difficulties Questionnaire (SDQ) is a tool to measure the risk for mental disorders
in children. The aim of this study is to describe the diagnostic efficiency and internal structure of ... [+]
Background: The Strengths and Difficulties Questionnaire (SDQ) is a tool to measure the risk for mental disorders
in children. The aim of this study is to describe the diagnostic efficiency and internal structure of the SDQ in the
sample of children studied in the Spanish National Health Survey 2006.
Methods: A representative sample of 6,773 children aged 4 to 15 years was studied. The data were obtained using
the Minors Questionnaire in the Spanish National Health Survey 2006. The ROC curve was constructed and
calculations made of the area under the curve, sensitivity, specificity and the Youden J indices. The factorial
structure was studied using models of exploratory factorial analysis (EFA) and confirmatory factorial analysis (CFA).
Results: The prevalence of behavioural disorders varied between 0.47% and 1.18% according to the requisites of
the diagnostic definition. The area under the ROC curve varied from 0.84 to 0.91 according to the diagnosis. Factor
models were cross-validated by means of two different random subsamples for EFA and CFA. An EFA suggested a
three correlated factor model. CFA confirmed this model. A five-factor model according to EFA and the theoretical
five-factor model described in the bibliography were also confirmed. The reliabilities of the factors of the different
models were acceptable (>0.70, except for one factor with reliability 0.62).
Conclusions: The diagnostic behaviour of the SDQ in the Spanish population is within the working limits described
in other countries. According to the results obtained in this study, the diagnostic efficiency of the questionnaire is
adequate to identify probable cases of psychiatric disorders in low prevalence populations. Regarding the factorial
structure we found that both the five and the three factor models fit the data with acceptable goodness of fit
indexes, the latter including an externalization and internalization dimension and perhaps a meaningful positive
social dimension.
Accordingly, we recommend studying whether these differences depend on sociocultural factors or are, in fact, due
to methodological questions. [-]
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