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Should Clinicians Split or Lump Psychiatric Symptoms? The Structure of Psychopathology in Two Large Pediatric Clinical Samples from England and Norway

Research output: Contribution to journalArticlepeer-review

Lorena Fernández de la Cruz, Pablo Vidal-Ribas, Nada Zahreddine, Børge Mathiassen, Per Håkan Brøndbo, Emily Simonoff, Robert Goodman, Argyris Stringaris

Original languageEnglish
Number of pages14
JournalChild Psychiatry and Human Development
Early online date14 Dec 2017
Accepted/In press7 Dec 2017
E-pub ahead of print14 Dec 2017


King's Authors


It has been suggested that the structure of psychiatric phenomena can be reduced to a few symptom dimensions. These proposals, mainly based on epidemiological samples, may not apply to clinical populations. We tested the structure of psychiatric symptoms across two pediatric clinical samples from England (N = 8434) and Norway (N = 5866). Confirmatory factor analyses of the parent-reported Strengths and Difficulties Questionnaire (SDQ) evaluated the relative fit of several models, including a first-order model, a second-order model with the widely-established broad symptom dimensions of internalizing-externalizing, and two bi-factor models capturing a general psychopathology factor. Predictive value of the SDQ subscales for psychiatric disorders was examined. A first-order five-factor solution better fit the data. The expected SDQ subscale(s) related best to the corresponding psychiatric diagnosis. In pediatric clinical samples, a granular approach to psychiatric symptoms where several dimensions are considered seems to fit the data better than models based on lumping symptoms into internalizing/externalizing dimensions.

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