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      Assessing adherence to dietary recommendations for hemodialysis patients: the Renal Adherence Attitudes Questionnaire (RAAQ) and the Renal Adherence Behaviour Questionnaire (RABQ).

      Journal of Psychosomatic Research
      Adolescent, Adult, Aged, Diet, Female, Humans, Male, Middle Aged, Patient Compliance, Predictive Value of Tests, Psychometrics, Questionnaires, standards, Renal Dialysis, psychology, Reproducibility of Results

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          Abstract

          This article describes preliminary investigations into the psychometric properties of two scales for hemodialysis patients (N=35): the Renal Adherence Attitudes Questionnaire (RAAQ), a 26-item scale measuring attitudes toward adherence: and the Renal Adherence Behaviour Questionnaire (RABQ), a 25-item scale measuring self-reported dietary (diet and fluid) adherence. Factor analysis of the RAAQ yielded a four-factor structure. These factors were attitudes to social restrictions, well-being, self-care/support, and acceptance. The scale demonstrated high internal and test-retest reliability. Factor analysis of the RABQ gave a five-factor structure: adherence to fluid restrictions; adherence regarding potassium and phosphate restrictions, adherence regarding self-care; adherence regarding sodium intake; and adherence in times of particular difficulty. This scale had moderately high internal reliability and high test-retest reliability. Validity for the RABQ was tested with independent measures of adherence; biochemical (serum potassium, serum phosphate, and interdialytic weight gain) and dietician-rated (potassium and fluid). There was little association among the differing measures of adherence. These scales facilitate empirical evaluation of dietary adherence for hemodialysis patients.

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