• Br J Gen Pract · Jun 2008

    Multicenter Study

    Complexity of GPs' explanations about mental health problems: development, reliability, and validity of a measure.

    • John Cape, Elena Morris, Mary Burd, and Marta Buszewicz.
    • Camden and Islington Foundation Trust, St Pancras Hospital, 4 St Pancras Way, London. j.cape@ucl.ac.uk
    • Br J Gen Pract. 2008 Jun 1; 58 (551): 403410403-8, 410.

    BackgroundHow GPs understand mental health problems determines their treatment choices; however, measures describing GPs' thinking about such problems are not currently available.AimTo develop a measure of the complexity of GP explanations of common mental health problems and to pilot its reliability and validity.Design Of StudyA qualitative development of the measure, followed by inter-rater reliability and validation pilot studies.SettingGeneral practices in North London.MethodVignettes of simulated consultations with patients with mental health problems were videotaped, and an anchored measure of complexity of psychosocial explanation in response to these vignettes was developed. Six GPs, four psychologists, and two lay people viewed the vignettes. Their responses were rated for complexity, both using the anchored measure and independently by two experts in primary care mental health. In a second reliability and revalidation study, responses of 50 GPs to two vignettes were rated for complexity. The GPs also completed a questionnaire to determine their interest and training in mental health, and they completed the Depression Attitudes Questionnaire.ResultsInter-rater reliability of the measure of complexity of explanation in both pilot studies was satisfactory (intraclass correlation coefficient = 0.78 and 0.72). The measure correlated with expert opinion as to what constitutes a complex explanation, and the responses of psychologists, GPs, and lay people differed in measured complexity. GPs with higher complexity scores had greater interest, more training in mental health, and more positive attitudes to depression.ConclusionResults suggest that the complexity of GPs' psychosocial explanations about common mental health problems can be reliably and validly assessed by this new standardised measure.

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