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Development and validation of an asthma self-knowledge questionnaire.

Adalberto Fernandes Dos Santos1,2,3, Renata Costa1, Henrique Pereira1,4,5

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A new questionnaire effectively assesses asthma self-knowledge, demonstrating good psychometric properties. It successfully differentiated between asthmatic and non-asthmatic individuals, highlighting the need for accurate asthma knowledge assessment.

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Area of Science:

  • Respiratory Medicine
  • Health Psychology
  • Psychometrics

Background:

  • Validated tools for assessing asthma knowledge are limited.
  • International asthma guidelines informed the questionnaire's development.
  • The study aimed to compare asthma knowledge between patient groups.

Purpose of the Study:

  • To develop and validate a robust asthma self-knowledge questionnaire.
  • To compare asthma knowledge levels in asthmatic versus non-asthmatic individuals.
  • To identify factors associated with diminished self-knowledge of asthma.

Main Methods:

  • The Bronchial Asthma Self-Knowledge Questionnaire was created and validated.
  • Content validity, construct validity, and internal consistency (Cronbach's alpha) were assessed.
  • Test-retest reliability was evaluated in 235 participants (104 asthmatics, 131 non-asthmatics).

Main Results:

  • The questionnaire was refined to 21 items with good content validity (I-CVI).
  • The tool demonstrated acceptable internal consistency and good temporal stability.
  • Asthmatic and non-asthmatic groups showed significant differences in self-knowledge scores; health literacy was a minor influencing factor.

Conclusions:

  • The developed questionnaire possesses adequate psychometric robustness for assessing asthma self-knowledge.
  • The validated tool effectively discriminates between individuals with and without asthma based on self-knowledge.
  • This provides a reliable instrument for evaluating asthma-related knowledge.